Clinical Approach to Vertigo and Dizziness
Comprehensive Practical Framework1. Symptom Overview
Understanding the clinical significance and classification of vertigo and dizziness
Dizziness is one of the most common complaints encountered in clinical practice, accounting for approximately 5% of all primary care visits and 4% of emergency department presentations. In adults over age 65, the prevalence of dizziness reaches 30%, making it a leading cause of falls and functional disability. The economic burden is substantial, with dizziness-related healthcare costs exceeding $1 billion annually in the United States alone. Despite its frequency, dizziness remains diagnostically challenging because the term encompasses multiple distinct sensations that patients often struggle to articulate.
Key Definitions
Dizziness is an umbrella term describing any sensation of altered spatial orientation or impaired balance. It is not a diagnosis but a symptom requiring careful characterization.
Vertigo specifically refers to the illusory perception of movement—typically spinning or rotation—when no actual movement is occurring. True vertigo indicates vestibular system dysfunction and represents a subset of dizziness presentations.
The Four Subtypes of Dizziness
Traditionally, dizziness has been classified into four distinct subtypes based on the quality of the patient’s experience. While recent research suggests patients may have difficulty reliably distinguishing these categories, this framework remains clinically useful for generating differential diagnoses.
| Subtype | Patient Description | Underlying System | Common Causes |
|---|---|---|---|
| Vertigo | “The room is spinning” or “I feel like I’m moving when I’m not” | Vestibular system (peripheral or central) | Benign paroxysmal positional vertigo, vestibular neuritis, Meniere disease, posterior circulation stroke |
| Presyncope | “I feel like I’m going to faint” or “lightheaded” | Cardiovascular system (cerebral hypoperfusion) | Orthostatic hypotension, arrhythmias, vasovagal episodes, dehydration |
| Disequilibrium | “I feel unsteady on my feet” or “off-balance when walking” | Multiple systems (sensory, motor, cerebellar) | Peripheral neuropathy, Parkinson disease, cerebellar disorders, cervical spondylosis |
| Nonspecific Dizziness | “Foggy,” “floating,” “disconnected,” or difficult to describe | Psychiatric, metabolic, or multifactorial | Anxiety disorders, depression, hyperventilation, medication effects, anemia |
Classification by Duration
The temporal profile of dizziness episodes is perhaps the single most important historical feature. Duration strongly predicts etiology and should guide the diagnostic approach.
| Category | Episode Duration | Most Common Causes | Clinical Significance |
|---|---|---|---|
| Seconds | Less than 1 minute (typically 10–30 seconds) | Benign paroxysmal positional vertigo, orthostatic hypotension, cardiac arrhythmias | Usually benign peripheral causes; brief duration suggests mechanical trigger or transient hemodynamic change |
| Minutes to Hours | 20 minutes to 12 hours | Meniere disease, vestibular migraine, transient ischemic attack | Episodic conditions with complete resolution between attacks; may have associated symptoms |
| Days | Continuous for days to weeks, then gradual improvement | Vestibular neuritis, labyrinthitis, cerebellar stroke | Single prolonged episode suggests acute vestibular lesion; central causes must be excluded |
| Chronic and Persistent | Constant symptoms lasting months to years | Persistent postural-perceptual dizziness, bilateral vestibulopathy, chronic anxiety | Often functional or multifactorial; structural lesions less likely if truly constant |
Classification by Triggers and Contexts
Position-Triggered
Description: Symptoms provoked by specific head positions or positional changes
Classic causes: Benign paroxysmal positional vertigo (rolling over in bed, looking up), orthostatic hypotension (standing from lying or sitting)
Clinical implication: Highly reproducible triggers suggest mechanical or hemodynamic etiology
Spontaneous
Description: Episodes occur without identifiable trigger, often unpredictably
Classic causes: Vestibular migraine, Meniere disease, cardiac arrhythmias, panic attacks
Clinical implication: Requires broader differential; episodic spontaneous vertigo warrants careful evaluation
Visually Triggered
Description: Symptoms induced by complex visual environments or visual motion
Classic causes: Persistent postural-perceptual dizziness, visual vertigo, vestibular migraine
Clinical implication: Suggests central vestibular processing dysfunction or visual-vestibular mismatch
Sound or Pressure-Triggered
Description: Vertigo induced by loud sounds (Tullio phenomenon) or pressure changes
Classic causes: Superior semicircular canal dehiscence, perilymphatic fistula
Clinical implication: Highly specific finding suggesting inner ear structural abnormality
Peripheral versus Central Vestibular Dysfunction
When true vertigo is identified, the critical clinical question is whether the cause is peripheral (inner ear or vestibular nerve) or central (brainstem or cerebellum). This distinction has profound implications for urgency and management.
| Feature | Peripheral Vestibular | Central Vestibular |
|---|---|---|
| Relative Frequency | Approximately 80–85% of vertigo cases | Approximately 15–20% of vertigo cases |
| Symptom Onset | Sudden, often with clear trigger | May be sudden or gradual |
| Severity | Often severe with intense nausea and vomiting | May be milder; disequilibrium may predominate |
| Hearing Loss | May be present (labyrinthitis, Meniere disease) | Rare (unless anterior inferior cerebellar artery stroke) |
| Neurological Signs | Absent (except vestibular findings) | Often present (diplopia, dysarthria, weakness, ataxia) |
| Nystagmus Pattern | Unidirectional, horizontal-torsional, suppressed by visual fixation | Bidirectional, vertical, or purely torsional; not suppressed by fixation |
| Gait | Impaired but usually able to walk with assistance | May be unable to walk; severe truncal ataxia suggests cerebellar lesion |
Key Concept: Timing and Triggers Over Type
Modern approaches emphasize that asking “What triggers your dizziness?” and “How long does it last?” is more diagnostically useful than asking patients to describe the quality of their dizziness. The combination of timing, triggers, and associated symptoms creates recognizable clinical syndromes:
- Triggered episodic vestibular syndrome: Brief episodes triggered by position changes → think benign paroxysmal positional vertigo
- Spontaneous episodic vestibular syndrome: Recurrent unprovoked episodes lasting minutes to hours → think Meniere disease or vestibular migraine
- Acute vestibular syndrome: Single prolonged episode lasting days → think vestibular neuritis or posterior circulation stroke
- Chronic vestibular syndrome: Persistent symptoms → think persistent postural-perceptual dizziness or bilateral vestibulopathy
Clinical Impact and Quality of Life
Epidemiological Highlights
- Lifetime prevalence: Approximately 20–30% of the general population will experience significant dizziness
- Elderly population: Dizziness affects up to 30% of those over 65 years and 50% of those over 85 years
- Falls risk: Vestibular dysfunction increases fall risk by 12-fold in the elderly
- Work disability: Chronic dizziness is a leading cause of work disability and reduced productivity
- Psychiatric comorbidity: Up to 50% of patients with chronic dizziness have comorbid anxiety or depression
2. Pathophysiology and Mechanisms
Understanding the underlying mechanisms of vertigo and dizziness
Spatial orientation and balance depend on the seamless integration of three sensory systems: the vestibular apparatus, the visual system, and the proprioceptive system. The brain continuously compares and reconciles information from these sources. When there is a mismatch—either from dysfunction in one system or conflicting signals between systems—the perception of dizziness results. Understanding these pathways is essential for localizing lesions and selecting appropriate treatments.
The Vestibular System: Anatomy and Function
| Component | Structure | Function | Clinical Relevance |
|---|---|---|---|
| Semicircular Canals | Three paired canals (horizontal, anterior, posterior) oriented in perpendicular planes | Detect angular acceleration (rotational head movements) | Benign paroxysmal positional vertigo results from otoconia displacement into canals, most commonly the posterior canal |
| Otolith Organs | Utricle and saccule within the vestibule | Detect linear acceleration and head position relative to gravity | Otoconia (calcium carbonate crystals) can dislodge and enter semicircular canals, causing positional vertigo |
| Vestibular Nerve | Superior and inferior divisions of cranial nerve VIII | Transmits vestibular signals to brainstem nuclei | Vestibular neuritis affects the superior division most commonly; acoustic neuromas compress the nerve at the cerebellopontine angle |
| Vestibular Nuclei | Four nuclei in the pontomedullary junction | Integrate vestibular input; project to oculomotor nuclei, spinal cord, and cortex | Central lesions affecting these nuclei produce vertigo with central features (direction-changing nystagmus, skew deviation) |
| Vestibulocerebellum | Flocculus, nodulus, and uvula of cerebellum | Calibrate vestibular reflexes; coordinate vestibular-visual integration | Cerebellar lesions produce ataxia and may cause vertigo that mimics peripheral disease |
| Vestibular Cortex | Insular cortex, temporoparietal junction, and other regions | Conscious perception of spatial orientation and motion | Cortical lesions rarely cause vertigo but may cause spatial disorientation |
Key Vestibular Reflexes
Vestibulo-ocular Reflex
Function: Stabilizes gaze during head movement by producing compensatory eye movements in the opposite direction
Pathway: Vestibular apparatus → vestibular nuclei → oculomotor nuclei → extraocular muscles
Clinical test: Head impulse test assesses vestibulo-ocular reflex function; a corrective saccade indicates peripheral vestibular hypofunction
Vestibulospinal Reflex
Function: Maintains postural stability by adjusting limb and trunk muscle tone in response to vestibular input
Pathway: Vestibular nuclei → lateral and medial vestibulospinal tracts → spinal motor neurons
Clinical test: Romberg test and tandem gait assess vestibulospinal function; patients fall toward the side of vestibular lesion
Vestibulo-colic Reflex
Function: Stabilizes the head on the body during movement and postural perturbations
Pathway: Vestibular nuclei → cervical motor neurons controlling neck muscles
Clinical relevance: Contributes to head stability; dysfunction may cause difficulty maintaining gaze during walking
The Mechanism of Nystagmus
Nystagmus—the rhythmic, involuntary oscillation of the eyes—is the hallmark physical finding in vestibular disorders. Understanding its mechanism clarifies why different patterns localize to different structures.
Why Vestibular Lesions Cause Nystagmus:
The vestibular system functions as a push-pull system, with the two labyrinths providing opposing signals that normally cancel each other at rest. When one labyrinth is damaged, the intact side continues to fire, creating an asymmetric signal that the brain interprets as head rotation toward the intact side. The vestibulo-ocular reflex then drives the eyes slowly toward the “lesioned” side (slow phase). The brain generates a fast corrective saccade back to center (fast phase). This cycle repeats, creating nystagmus with the fast phase beating away from the lesion.
| Nystagmus Feature | Peripheral Pattern | Central Pattern |
|---|---|---|
| Direction | Unidirectional (always beats in same direction regardless of gaze) | May be bidirectional (changes direction with gaze), vertical, or purely torsional |
| Effect of Gaze | Increases when looking toward fast phase (Alexander’s law) | May change direction with gaze; may not follow Alexander’s law |
| Visual Fixation | Suppressed by visual fixation (decreases when patient focuses on target) | Not suppressed or may increase with fixation |
| Character | Horizontal-torsional (combined horizontal and rotational) | May be purely vertical (upbeat or downbeat) or purely torsional |
How Common Conditions Cause Vertigo
| Condition | Mechanism | Treatment Implication |
|---|---|---|
| Benign Paroxysmal Positional Vertigo | Otoconia (calcium carbonate crystals) dislodge from the utricle and migrate into a semicircular canal, most often the posterior canal. With position change, the crystals move within the canal, deflecting the cupula and creating an inappropriate signal of head rotation. The brain perceives rotation that is not occurring. | Canalith repositioning maneuvers (such as the Epley maneuver) use gravity to move otoconia out of the semicircular canal back to the utricle, providing immediate cure in most cases. |
| Vestibular Neuritis | Viral inflammation (often reactivation of herpes simplex virus type 1) damages the vestibular nerve, causing acute unilateral vestibular hypofunction. The sudden loss of input from one labyrinth creates a profound asymmetry that the brain interprets as continuous rotation. | Central compensation occurs over days to weeks as the brain recalibrates to function with asymmetric vestibular input. Vestibular rehabilitation accelerates compensation; vestibular suppressants may delay it if used beyond the acute phase. |
| Meniere Disease | Endolymphatic hydrops (excess fluid in the endolymphatic space) causes distention and eventual rupture of the membranous labyrinth, allowing mixing of endolymph and perilymph. This causes acute hair cell dysfunction in both auditory and vestibular structures, producing vertigo with fluctuating hearing loss and tinnitus. | Dietary salt restriction and diuretics aim to reduce endolymph production. Acute attacks may require vestibular suppressants. Refractory cases may benefit from intratympanic gentamicin or surgery. |
| Vestibular Migraine | Cortical spreading depression and trigeminal activation affect vestibular processing pathways, causing episodic vestibular symptoms. The mechanism may involve direct effects on vestibular nuclei, cortical vestibular areas, or both. There is significant overlap with motion sickness susceptibility. | Migraine preventive medications (beta-blockers, topiramate, amitriptyline) reduce attack frequency. Acute treatment follows standard migraine protocols. Lifestyle modifications addressing migraine triggers are important. |
| Posterior Circulation Stroke | Ischemia affecting the brainstem vestibular nuclei, cerebellum (especially the nodulus and flocculus), or their connections produces acute vestibular syndrome. The anterior inferior cerebellar artery supplies the inner ear, so its occlusion may also cause hearing loss. | Urgent recognition is critical as thrombolysis or thrombectomy may be indicated. The HINTS examination (Head Impulse, Nystagmus, Test of Skew) can distinguish central from peripheral causes at the bedside with high sensitivity. |
| Persistent Postural-Perceptual Dizziness | Following an initial vestibular insult, maladaptive central processing develops. There is excessive reliance on visual and somatosensory inputs, with heightened sensitivity to visual motion and postural threat. This represents a functional vestibular disorder, not a structural lesion. | Vestibular rehabilitation focuses on habituation to provoking stimuli. Selective serotonin reuptake inhibitors (particularly sertraline) are effective. Cognitive behavioral therapy addresses maladaptive fear-avoidance behaviors. |
Vascular Supply and Stroke Syndromes
The posterior circulation supplies the vestibular structures, making vascular disease a critical consideration in acute vertigo presentations.
| Artery | Structures Supplied | Stroke Presentation |
|---|---|---|
| Posterior Inferior Cerebellar Artery | Lateral medulla, inferior cerebellum (tonsil, inferior vermis), vestibular nuclei | Lateral medullary (Wallenberg) syndrome: vertigo, nystagmus, ipsilateral Horner syndrome, crossed sensory loss, dysphagia, ataxia |
| Anterior Inferior Cerebellar Artery | Lateral pons, inner ear (labyrinthine artery), flocculus, middle cerebellar peduncle | Vertigo with hearing loss (unique among strokes), facial weakness, ipsilateral ataxia, crossed sensory loss |
| Superior Cerebellar Artery | Superior cerebellum, superior cerebellar peduncle, part of midbrain | Ataxia, intention tremor, dysarthria; vertigo less prominent |
| Basilar Artery | Pons, midbrain, branches to cerebellum | Variable: may cause isolated vertigo early; progression may cause quadriparesis, locked-in syndrome |
Often Overlooked: Isolated Cerebellar Infarction
Cerebellar strokes can present with isolated vertigo, nystagmus, and gait unsteadiness that closely mimics vestibular neuritis. Because the cerebellum is “downstream” from the vestibular nuclei in vestibulo-ocular reflex pathways, small cerebellar lesions may preserve the head impulse test, further mimicking peripheral disease. The key distinguishing features are:
- Severe gait ataxia out of proportion to vertigo (unable to walk even with assistance)
- Direction-changing nystagmus or nystagmus not suppressed by fixation
- Skew deviation (vertical misalignment of eyes)
- Normal head impulse test in the setting of acute vestibular syndrome
The HINTS examination (Head Impulse-Nystagmus-Test of Skew) is more sensitive than early MRI for detecting posterior circulation stroke in acute vestibular syndrome.
Sensory Integration and Compensation
The brain maintains balance through continuous integration of vestibular, visual, and proprioceptive inputs. Understanding this integration explains why vestibular symptoms improve with time and why certain environments exacerbate symptoms.
Central Compensation
Following unilateral vestibular loss, the brain gradually recalibrates through several mechanisms: rebalancing of tonic activity between vestibular nuclei, increased reliance on visual and proprioceptive inputs, and cerebellar-mediated recalibration of vestibular reflexes. This process takes weeks to months and is enhanced by active movement and vestibular rehabilitation.
Decompensation
A previously compensated vestibular lesion can “decompensate” under certain circumstances: intercurrent illness, fatigue, new medications (especially sedatives), or stress. Patients may experience recurrence of vertigo symptoms despite no new vestibular injury. Recognition of decompensation prevents unnecessary workup.
3. History Taking
A comprehensive approach to eliciting the vertigo and dizziness history
Red Flags — Require Urgent Evaluation
- Acute onset with neurological symptoms — diplopia, dysarthria, dysphagia, facial weakness, limb weakness or numbness suggest posterior circulation stroke
- Severe headache accompanying vertigo — consider vertebral artery dissection, cerebellar hemorrhage, or subarachnoid hemorrhage
- Inability to walk or stand — severe truncal ataxia suggests cerebellar pathology
- New onset in patient with vascular risk factors — hypertension, diabetes, atrial fibrillation, smoking increase stroke risk
- Sudden unilateral hearing loss with vertigo — labyrinthine infarction (anterior inferior cerebellar artery territory) or sudden sensorineural hearing loss requiring urgent treatment
- Recent head or neck trauma — vertebral artery dissection, temporal bone fracture, perilymphatic fistula
- Vertigo with fever and altered consciousness — meningitis, encephalitis, or cerebellar abscess
- Progressive unilateral hearing loss with vertigo — acoustic neuroma (vestibular schwannoma) requires imaging
Systematic History: The “SPINS” Approach
Use the mnemonic “SPINS” to ensure comprehensive history taking for vertigo and dizziness:
- S — Sensation: What exactly do you feel? Is it spinning, lightheadedness, unsteadiness, or something else?
- P — Provoking and Palliating factors: What brings it on? What makes it better or worse? Any position changes, head movements, or environmental triggers?
- I — Intensity and Impact: How severe is it? Does it affect your daily activities, work, or ability to walk? Any nausea or vomiting?
- N — Nature and Number: How long does each episode last? How many episodes have you had? Is it continuous or intermittent?
- S — Secondary Symptoms: Any hearing changes, tinnitus, ear fullness, headache, visual changes, weakness, numbness, or speech difficulty?
Critical Timing Questions
The temporal profile is the most diagnostically useful element of the history. These specific questions help categorize the presentation:
| Question | Why It Matters | Diagnostic Implications |
|---|---|---|
| “How long does each episode last?” | Duration is the single most discriminating historical feature | Seconds = benign paroxysmal positional vertigo; Minutes to hours = Meniere disease or vestibular migraine; Days = vestibular neuritis or stroke; Chronic = persistent postural-perceptual dizziness |
| “Is this one prolonged episode or many short episodes?” | Distinguishes acute vestibular syndrome from episodic vestibular syndrome | Single prolonged episode requires exclusion of stroke; Recurrent episodes suggest benign paroxysmal positional vertigo, Meniere disease, or vestibular migraine |
| “When you say it lasts all day, do you mean constant or does it come and go?” | Patients often conflate “having dizziness all day” with continuous symptoms | Many brief episodes throughout the day suggests positional trigger; Truly constant symptoms suggest persistent postural-perceptual dizziness or central lesion |
| “What were you doing when it started?” | Identifies triggering context | Rolling over in bed or looking up = positional vertigo; Spontaneous onset = Meniere disease, vestibular migraine, or vascular event |
Targeted Questions by Suspected Cause
| Suspected Cause | Key Features | Ask This Question |
|---|---|---|
| Benign paroxysmal positional vertigo | Brief episodes (less than 1 minute), triggered by position change, no hearing symptoms | “Does rolling over in bed or looking up at a shelf bring on the spinning? Does it stop within a minute if you hold still?” |
| Vestibular neuritis | Single prolonged episode lasting days, often following viral illness, no hearing loss | “Did this come on suddenly and has it been continuous for days? Did you have a cold or flu before this started? Is your hearing normal?” |
| Meniere disease | Episodic vertigo (20 minutes to 12 hours), fluctuating hearing loss, tinnitus, aural fullness | “Before or during the spinning, does your ear feel full or blocked? Do you notice ringing or roaring in one ear? Does your hearing seem to fluctuate?” |
| Vestibular migraine | Episodic vertigo with migraine features, may occur with or without headache | “Do you get headaches? During the dizziness, are you sensitive to light or sound? Do you have a history of motion sickness or migraines?” |
| Posterior circulation stroke | Acute onset, vascular risk factors, associated neurological symptoms | “Did this start suddenly? Do you have any double vision, slurred speech, trouble swallowing, or weakness or numbness anywhere? Do you have high blood pressure, diabetes, or heart problems?” |
| Orthostatic hypotension | Lightheadedness on standing, improves with sitting or lying | “Does the dizziness happen when you stand up? Does it get better if you sit or lie down? Have you started any new blood pressure medications?” |
| Cardiac arrhythmia | Palpitations, presyncope, brief episodes | “Do you feel your heart racing or skipping beats during the episodes? Have you ever fainted completely? Does it happen with exertion?” |
| Persistent postural-perceptual dizziness | Chronic (more than 3 months), worsened by visual stimuli and upright posture, often follows initial vestibular event | “Is the dizziness worse in busy visual environments like supermarkets or scrolling on your phone? Did it start after an initial episode of vertigo? Do you feel more unsteady when standing or walking than when sitting?” |
| Superior semicircular canal dehiscence | Vertigo triggered by loud sounds or pressure changes, autophony | “Do loud sounds make you dizzy? Can you hear your own footsteps or heartbeat unusually loudly in one ear? Does straining or coughing trigger vertigo?” |
Associated Symptoms and Their Significance
| Associated Symptom | Suggests | Does NOT Suggest |
|---|---|---|
| Unilateral hearing loss | Meniere disease, labyrinthitis, acoustic neuroma, anterior inferior cerebellar artery stroke | Benign paroxysmal positional vertigo, vestibular neuritis (hearing preserved) |
| Tinnitus | Meniere disease, acoustic neuroma, labyrinthitis | Vestibular neuritis, benign paroxysmal positional vertigo |
| Aural fullness | Meniere disease, eustachian tube dysfunction | Central causes, benign paroxysmal positional vertigo |
| Headache | Vestibular migraine, vertebral artery dissection, cerebellar hemorrhage | Benign paroxysmal positional vertigo, Meniere disease (typically) |
| Diplopia | Brainstem or cerebellar stroke, multiple sclerosis | Peripheral vestibular disorders |
| Dysarthria or dysphagia | Brainstem stroke (lateral medullary syndrome) | Peripheral vestibular disorders |
| Severe nausea and vomiting | Acute peripheral vestibular lesion (vestibular neuritis), but also cerebellar stroke | Does not distinguish peripheral from central (both can cause severe nausea) |
Medication and Substance History
Medications That Cause Dizziness
- Antihypertensives — orthostatic hypotension (especially alpha-blockers, diuretics, vasodilators)
- Aminoglycoside antibiotics — vestibulotoxicity (gentamicin, streptomycin); may be bilateral and permanent
- Loop diuretics — ototoxicity, especially with aminoglycosides
- Anticonvulsants — cerebellar toxicity (phenytoin, carbamazepine) at high levels
- Sedatives and benzodiazepines — central nervous system depression, impaired vestibular compensation
- Antidepressants — orthostatic hypotension (tricyclics), serotonin syndrome
- Chemotherapy agents — cisplatin causes irreversible vestibulotoxicity
- Salicylates — tinnitus and dizziness at toxic levels
Social and Substance History
- Alcohol — acute intoxication causes positional vertigo; chronic use causes cerebellar degeneration
- Caffeine — may exacerbate Meniere disease and vestibular migraine
- Tobacco — vascular risk factor; associated with Meniere disease exacerbation
- Recreational drugs — cannabis, stimulants can cause dizziness
- Occupational exposures — solvents, heavy metals can cause vestibulotoxicity
- Noise exposure — occupational noise associated with vestibular dysfunction
- Diving or flying — barotrauma can cause perilymphatic fistula or alternobaric vertigo
Relevant Past Medical History
Vascular Risk Factors
Hypertension, diabetes mellitus, hyperlipidemia, atrial fibrillation, smoking history, prior stroke or transient ischemic attack, coronary artery disease, peripheral vascular disease. These increase the probability of posterior circulation stroke as the cause of acute vertigo.
Migraine History
Personal or family history of migraine, motion sickness susceptibility, history of cyclical vomiting in childhood. Vestibular migraine is underdiagnosed; many patients do not have headache with their vestibular episodes.
Autoimmune Disease
Rheumatoid arthritis, lupus, Sjogren syndrome, Cogan syndrome. Autoimmune inner ear disease can cause fluctuating hearing loss and vertigo similar to Meniere disease.
Psychiatric History
Anxiety disorders, panic disorder, depression, agoraphobia. There is bidirectional relationship between vestibular and psychiatric symptoms. Persistent postural-perceptual dizziness has high psychiatric comorbidity.
Family History Considerations
- Migraine: Strong familial tendency; supports vestibular migraine diagnosis
- Meniere disease: Approximately 10% have family history
- Hearing loss: Hereditary hearing loss syndromes may include vestibular dysfunction
- Early stroke or cardiac disease: May indicate inherited thrombophilia or cardiac conditions
- Episodic ataxia: Rare channelopathies causing episodic vertigo and ataxia
4. Physical Examination
A systematic approach to examining patients with vertigo and dizziness
Systematic Framework: The examination of a dizzy patient has two goals: (1) identify features that distinguish dangerous central causes from benign peripheral causes, and (2) reproduce or characterize the patient’s symptoms to confirm the diagnosis. The HINTS examination is the cornerstone for evaluating acute vestibular syndrome, while positional testing is essential for episodic positional vertigo.
General Inspection
- Appearance: Does the patient appear acutely ill? Are they pale, diaphoretic, or in distress? Patients with acute peripheral vestibular lesions often appear very uncomfortable with marked nausea.
- Posture and movement: Is the patient lying still (suggests acute vestibular lesion—movement worsens symptoms) or comfortable sitting up? Can they walk into the room or do they need assistance?
- Spontaneous nystagmus: Observe the eyes at rest. Is there visible nystagmus without provocation? Note the direction and whether it changes with gaze direction.
- Head position: Is the patient tilting their head? Patients may tilt toward the side of a vestibular lesion to minimize symptoms.
Vital Signs
| Vital Sign | What to Look For | Clinical Significance |
|---|---|---|
| Blood Pressure (lying and standing) | Drop of more than 20 mmHg systolic or more than 10 mmHg diastolic within 3 minutes of standing | Orthostatic hypotension is a common and treatable cause of presyncope and lightheadedness, especially in elderly patients and those on antihypertensives |
| Heart Rate | Bradycardia, tachycardia, or irregular rhythm | Arrhythmias can cause presyncope; inadequate heart rate rise with standing suggests autonomic dysfunction |
| Respiratory Rate | Tachypnea, hyperventilation pattern | Hyperventilation causes dizziness through hypocapnia; may indicate anxiety or panic |
| Temperature | Fever | Suggests infectious cause: labyrinthitis, meningitis, or systemic infection causing decompensation of prior vestibular lesion |
| Oxygen Saturation | Hypoxemia | Hypoxia can cause lightheadedness; consider pulmonary embolism if unexplained |
The HINTS Examination for Acute Vestibular Syndrome
The HINTS examination (Head Impulse, Nystagmus, Test of Skew) is used to evaluate patients with acute vestibular syndrome—defined as acute onset of continuous vertigo lasting more than 24 hours with nystagmus and gait unsteadiness. In this context, HINTS is more sensitive than early MRI for detecting posterior circulation stroke.
Critical Point: When to Use HINTS
HINTS is validated ONLY for acute vestibular syndrome (continuous vertigo for more than 24 hours). Do not use HINTS to evaluate brief episodic vertigo (such as suspected benign paroxysmal positional vertigo) or chronic dizziness—it will not be informative in these settings.
| Component | How to Perform | Peripheral (Benign) Finding | Central (Dangerous) Finding |
|---|---|---|---|
| Head Impulse Test | Patient fixates on examiner’s nose. Examiner rapidly rotates patient’s head approximately 15 degrees to one side. Watch for corrective saccade (catch-up eye movement) back to target. | ABNORMAL (positive): Corrective saccade present when head turned toward affected ear. This indicates peripheral vestibular hypofunction and is reassuring. | NORMAL (negative): No corrective saccade in either direction. A normal head impulse test in acute vestibular syndrome is concerning for central cause. |
| Nystagmus | Observe eyes in primary gaze and with gaze in each direction. Use Frenzel lenses or video-oculography if available to remove visual fixation. | Unidirectional: Fast phase always beats in same direction regardless of gaze direction; intensity increases looking toward fast phase (Alexander’s law); suppressed by visual fixation. | Direction-changing: Fast phase changes direction with gaze (beats right when looking right, left when looking left). Also concerning: purely vertical nystagmus, purely torsional nystagmus, nystagmus not suppressed by fixation. |
| Test of Skew | Alternate cover test: cover one eye, then quickly move cover to other eye. Watch for vertical refixation movement of the uncovered eye. | NEGATIVE: No vertical refixation movement—eyes are aligned. | POSITIVE (skew deviation): Vertical refixation movement indicates vertical misalignment of eyes, suggesting brainstem lesion. |
Interpreting HINTS:
- Peripheral pattern (reassuring): Abnormal head impulse test + Unidirectional nystagmus + Negative test of skew → Likely vestibular neuritis
- Central pattern (concerning): Normal head impulse test OR Direction-changing nystagmus OR Positive skew deviation → Posterior circulation stroke until proven otherwise
The mnemonic “INFARCT” can help: Impulse Normal, Fast-phase Alternating, Refixation on Cover Test = Central cause likely
Dix-Hallpike Test for Positional Vertigo
The Dix-Hallpike maneuver is the diagnostic test of choice for benign paroxysmal positional vertigo affecting the posterior semicircular canal, which accounts for 80–90% of cases.
| Step | Technique | What to Observe |
|---|---|---|
| 1. Starting position | Patient sits on examination table with legs extended, positioned so head will hang over edge when supine. | Explain the procedure and that vertigo may occur but will be brief. |
| 2. Head rotation | Turn patient’s head 45 degrees to one side (toward the ear being tested). | This aligns the posterior semicircular canal with the sagittal plane. |
| 3. Rapid movement to supine | Rapidly move patient from sitting to supine with head hanging approximately 20 degrees below horizontal, maintaining 45-degree rotation. | Move briskly—slow movements may not displace otoconia sufficiently. |
| 4. Observe for nystagmus | Watch eyes for 30–60 seconds. Use Frenzel lenses if available. | Positive test shows upbeat-torsional nystagmus (top of eyes beat toward lower ear) after brief latency (2–20 seconds), lasting less than 1 minute, with associated vertigo. |
| 5. Return to sitting | Slowly return patient to sitting position. | May see reversal of nystagmus direction briefly. |
| 6. Test opposite side | Rest 1–2 minutes, then repeat with head turned to opposite side. | Compare responses; affected side shows positive response. |
Interpreting Dix-Hallpike Results
- Classic positive: Latency (2–20 seconds), upbeat-torsional nystagmus, duration less than 1 minute, fatigable with repetition → Posterior canal benign paroxysmal positional vertigo
- Atypical features suggesting central cause: No latency (immediate onset), purely vertical or purely torsional nystagmus, duration more than 1 minute, non-fatigable, no associated vertigo
- Horizontal nystagmus: Suggests horizontal (lateral) canal involvement; perform supine roll test instead
Additional Vestibular Examination Maneuvers
Supine Roll Test
Purpose: Diagnose horizontal canal benign paroxysmal positional vertigo
Technique: Patient supine, rapidly turn head 90 degrees to one side, observe for horizontal nystagmus; repeat to opposite side
Interpretation: Horizontal nystagmus beating toward the ground (geotropic) or away from ground (apogeotropic); affected side is typically the side with stronger response
Romberg Test
Purpose: Assess vestibulospinal function and proprioception
Technique: Patient stands with feet together, eyes open then closed
Interpretation: Increased sway or fall with eyes closed suggests vestibular or proprioceptive dysfunction; immediate fall with eyes open suggests cerebellar pathology
Unterberger (Fukuda) Stepping Test
Purpose: Detect asymmetric vestibular function
Technique: Patient marches in place with eyes closed for 50 steps
Interpretation: Rotation more than 45 degrees toward one side suggests ipsilateral vestibular hypofunction
Dynamic Visual Acuity
Purpose: Assess vestibulo-ocular reflex function
Technique: Test visual acuity with head still, then with passive head oscillation at approximately 2 Hz
Interpretation: Loss of more than 2 lines on eye chart with head movement indicates vestibulo-ocular reflex dysfunction
Focused Neurological Examination
| System | What to Examine | Abnormality Suggests |
|---|---|---|
| Cranial Nerves | Pupils (III), facial sensation (V), facial strength (VII), hearing (VIII), palate elevation (IX, X), tongue (XII) | Multiple cranial nerve deficits suggest brainstem lesion; isolated VIII involvement may be peripheral or central |
| Eye Movements | Smooth pursuit, saccades, range of motion, gaze-evoked nystagmus | Internuclear ophthalmoplegia suggests multiple sclerosis or brainstem stroke; gaze-evoked nystagmus suggests cerebellar or brainstem lesion |
| Motor | Strength in all four limbs, pronator drift | Hemiparesis or crossed motor findings indicate brainstem stroke |
| Sensory | Light touch, pinprick, particularly looking for crossed patterns | Ipsilateral face and contralateral body sensory loss suggests lateral medullary syndrome |
| Coordination | Finger-nose-finger, heel-shin, rapid alternating movements | Limb ataxia out of proportion to vertigo suggests cerebellar lesion |
| Gait | Tandem gait, observe for ataxia, note ability to walk unassisted | Severe truncal ataxia (unable to sit unsupported or walk even with assistance) highly suggests cerebellar stroke |
Otologic Examination
- External ear and canal: Vesicles suggest Ramsay Hunt syndrome (herpes zoster oticus); cerumen impaction can cause dizziness
- Tympanic membrane: Middle ear effusion, cholesteatoma, or perforation may indicate source of vertigo
- Pneumatic otoscopy (Hennebert sign): Vertigo or nystagmus with pressure changes suggests superior semicircular canal dehiscence or perilymphatic fistula
- Hearing assessment: Finger rub test or whispered voice; Weber and Rinne tests with tuning fork. Unilateral sensorineural hearing loss with vertigo is significant.
Cardiovascular Examination
- Heart rhythm: Irregular rhythm suggests atrial fibrillation (stroke risk factor and cause of presyncope)
- Murmurs: Aortic stenosis can cause exertional presyncope
- Carotid bruits: May indicate cerebrovascular disease, though posterior circulation is not assessed by carotid examination
- Orthostatic vital signs: As described above—essential in any patient with lightheadedness
Expected Findings by Etiology
| Condition | General Appearance | Vestibular Examination | Neurological Examination |
|---|---|---|---|
| Benign paroxysmal positional vertigo | Appears well between episodes | Positive Dix-Hallpike with characteristic nystagmus; normal between maneuvers | Normal |
| Vestibular neuritis | Acutely ill with nausea, prefers to lie still | Spontaneous unidirectional nystagmus, positive head impulse test toward affected side, negative skew | Normal (no focal deficits) |
| Meniere disease | Variable; may be well between attacks | During attack: spontaneous nystagmus; between attacks: may have mild unilateral vestibular hypofunction | Normal; may have unilateral hearing loss |
| Vestibular migraine | May appear uncomfortable during episode | Variable: may have nystagmus during episode; often normal between episodes | Normal; may have photophobia or phonophobia during episode |
| Posterior circulation stroke | Variable; may appear deceptively well | HINTS central pattern: normal head impulse, direction-changing nystagmus, or skew deviation | Often abnormal: ataxia, cranial nerve deficits, crossed sensory findings, dysarthria, Horner syndrome |
| Orthostatic hypotension | Appears well when supine | No spontaneous nystagmus; negative Dix-Hallpike | Normal; positive orthostatic vital signs |
| Persistent postural-perceptual dizziness | Anxious, may describe symptoms dramatically | Normal vestibular examination; may have mild postural sway | Normal |
Important Teaching Point
The deceptively normal neurological examination: Unlike anterior circulation strokes, posterior circulation strokes may present with isolated vertigo and a near-normal neurological examination. Up to 20% of cerebellar strokes have no limb ataxia or other “classic” findings initially. The key is recognizing the HINTS central pattern. A normal head impulse test in acute vestibular syndrome should raise concern for stroke, not provide reassurance.
Conversely, severe symptoms do not mean central cause: Patients with vestibular neuritis often appear extremely ill with intractable vomiting and inability to stand, yet this is a benign peripheral condition. Severity of symptoms does not distinguish central from peripheral causes—the pattern of findings does.
5. Differential Diagnosis
Systematic approach organized by timing pattern, probability, and clinical features
The differential diagnosis of vertigo and dizziness is best organized by the temporal pattern of symptoms rather than by traditional anatomical categories. This approach aligns with how patients describe their symptoms and directly guides the diagnostic workup. Within each temporal category, conditions are organized by probability.
Acute Vestibular Syndrome (Continuous Vertigo Lasting Days)
Defined as rapid onset of vertigo, nausea, nystagmus, and gait unsteadiness persisting continuously for more than 24 hours. This presentation requires urgent differentiation between peripheral and central causes.
| Probability | Condition | Key Features | Red Flags for This Diagnosis |
|---|---|---|---|
| COMMON (approximately 70–80%) | Vestibular neuritis | Sudden onset, often post-viral; severe vertigo with nausea and vomiting; gradual improvement over days to weeks; hearing preserved | None—this is the benign diagnosis; confirmed by peripheral HINTS pattern |
| COMMON | Labyrinthitis | Same as vestibular neuritis but WITH unilateral hearing loss and/or tinnitus; suggests labyrinthine rather than isolated nerve involvement | Hearing loss requires audiometry; consider autoimmune or infectious causes |
| LESS COMMON (approximately 15–20%) | Posterior circulation stroke (cerebellar or brainstem) | Sudden onset; vascular risk factors; may have subtle neurological signs; HINTS central pattern | Normal head impulse test, direction-changing nystagmus, skew deviation, severe gait ataxia, any focal neurological deficit |
| LESS COMMON | Multiple sclerosis (acute demyelinating lesion) | Younger patient; may have prior neurological episodes; brainstem or cerebellar lesion on MRI | Age less than 50, prior unexplained neurological symptoms, internuclear ophthalmoplegia |
| UNCOMMON BUT SERIOUS (approximately 5%) | Cerebellar hemorrhage | Sudden severe headache with vertigo; rapidly progressive; hypertension common | Severe headache, decreasing consciousness, inability to walk, signs of brainstem compression |
| UNCOMMON BUT SERIOUS | Vertebral artery dissection | Neck pain, often following trauma or chiropractic manipulation; posterior circulation stroke symptoms | Neck pain, recent neck trauma or manipulation, Horner syndrome |
| UNCOMMON BUT SERIOUS | Bacterial labyrinthitis or meningitis | Fever, severe illness, may follow otitis media; rapid hearing loss | Fever, ear infection, meningeal signs, altered consciousness |
Triggered Episodic Vestibular Syndrome (Brief Episodes Triggered by Position)
Episodes lasting seconds to minutes, reliably triggered by specific head positions or movements.
| Probability | Condition | Key Features | Distinguishing Factors |
|---|---|---|---|
| VERY COMMON (approximately 90%) | Benign paroxysmal positional vertigo — posterior canal | Episodes lasting 10–30 seconds; triggered by rolling over, lying down, looking up; positive Dix-Hallpike with upbeat-torsional nystagmus | Latency before nystagmus onset (2–20 seconds); fatigable with repeated testing; no hearing symptoms |
| COMMON | Benign paroxysmal positional vertigo — horizontal canal | Episodes triggered by turning head while supine; horizontal nystagmus on supine roll test | Nystagmus is horizontal (not torsional); may be geotropic or apogeotropic |
| LESS COMMON | Orthostatic hypotension | Lightheadedness (not true vertigo) on standing; improves with sitting or lying; no nystagmus | Triggered by standing (not head position while supine); positive orthostatic vital signs |
| UNCOMMON | Central positional vertigo | Positional nystagmus without latency, non-fatigable, may be purely downbeat or purely torsional | Atypical nystagmus pattern; may have other cerebellar signs; posterior fossa lesion |
| UNCOMMON | Superior semicircular canal dehiscence | Vertigo triggered by loud sounds (Tullio phenomenon) or pressure changes; autophony; bone conduction hyperacusis | Sound or pressure triggers; can hear own footsteps or eye movements; CT temporal bone diagnostic |
Spontaneous Episodic Vestibular Syndrome (Recurrent Episodes Without Clear Trigger)
Recurrent episodes of vertigo lasting minutes to hours, occurring spontaneously without positional triggers.
Approach to Spontaneous Episodic Vertigo:
- Step 1: Determine episode duration — minutes to hours suggests Meniere disease or vestibular migraine; seconds suggests cardiac arrhythmia or transient ischemic attack
- Step 2: Assess for auditory symptoms — presence of hearing loss, tinnitus, or aural fullness favors Meniere disease
- Step 3: Screen for migraine features — headache, photophobia, phonophobia, visual aura, motion sensitivity favor vestibular migraine
- Step 4: Consider vascular risk — older patients with vascular risk factors require evaluation for transient ischemic attack
| Probability | Condition | Episode Duration | Key Distinguishing Features |
|---|---|---|---|
| COMMON (approximately 40%) | Vestibular migraine | Minutes to 72 hours (variable) | History of migraine; episodes may or may not include headache; photophobia, phonophobia, or visual aura; motion sensitivity; may have positional component |
| COMMON (approximately 30%) | Meniere disease | 20 minutes to 12 hours (typically 2–4 hours) | Fluctuating unilateral hearing loss, tinnitus, and aural fullness; symptoms cluster together during attacks; low-frequency hearing loss on audiometry |
| LESS COMMON | Vestibular paroxysmia (neurovascular compression) | Seconds to minutes (typically less than 1 minute) | Very brief attacks, often multiple per day; may be triggered by certain head positions; responds to carbamazepine |
| LESS COMMON | Cardiac arrhythmia | Seconds to minutes | Presyncope rather than true vertigo; palpitations; may have syncope; no nystagmus during episodes |
| UNCOMMON BUT SERIOUS | Posterior circulation transient ischemic attack | Minutes (typically less than 1 hour) | Vascular risk factors; older age; may have transient neurological symptoms (diplopia, dysarthria, weakness); isolated vertigo TIA is rare but possible |
| UNCOMMON | Episodic ataxia type 2 | Hours to days | Family history; onset in childhood or adolescence; interictal nystagmus; responds to acetazolamide |
| UNCOMMON | Perilymphatic fistula | Variable | History of trauma, barotrauma, or surgery; vertigo with straining or pressure changes; progressive hearing loss |
Chronic Vestibular Syndrome (Persistent Symptoms for Months or Longer)
| Probability | Condition | Approximate Frequency | Key Distinguishing Features |
|---|---|---|---|
| COMMON | Persistent postural-perceptual dizziness | Most common cause of chronic dizziness | Symptoms present most days for 3 or more months; worsened by upright posture, active or passive motion, and complex visual stimuli; often follows initial vestibular event; normal vestibular examination |
| COMMON | Uncompensated unilateral vestibular loss | Common after vestibular neuritis | Persistent imbalance and motion sensitivity following acute vestibular event; may have residual vestibular hypofunction on testing; improves with vestibular rehabilitation |
| COMMON | Medication-induced dizziness | Very common in elderly | Temporal relationship with medication initiation or dose change; multiple potential culprits (see drug-induced causes table) |
| LESS COMMON | Bilateral vestibulopathy | Underdiagnosed | Oscillopsia (visual blurring with head movement); imbalance worse in dark; bilateral vestibular hypofunction on testing; often caused by ototoxic medications (aminoglycosides) |
| LESS COMMON | Vestibular schwannoma (acoustic neuroma) | 1 per 100,000 per year | Progressive unilateral hearing loss (gradual); tinnitus; mild imbalance rather than severe vertigo; MRI diagnostic |
| LESS COMMON | Cerebellar degeneration | Uncommon | Progressive ataxia; may be hereditary, alcoholic, or paraneoplastic; cerebellar atrophy on imaging |
| UNCOMMON | Mal de debarquement syndrome | Rare | Persistent rocking or swaying sensation following travel (cruise, flight); symptoms paradoxically improve with passive motion (driving) |
Anatomical Approach to Vertigo
Peripheral Vestibular (Inner Ear)
Benign paroxysmal positional vertigo
Vestibular neuritis
Labyrinthitis
Meniere disease
Superior canal dehiscence
Perilymphatic fistula
Vestibular schwannoma
Ototoxicity
Central Vestibular (Brainstem/Cerebellum)
Posterior circulation stroke
Cerebellar hemorrhage
Multiple sclerosis
Brainstem tumors
Chiari malformation
Cerebellar degeneration
Wernicke encephalopathy
Central positional vertigo
Cardiovascular
Orthostatic hypotension
Cardiac arrhythmias
Vasovagal presyncope
Aortic stenosis
Carotid sinus hypersensitivity
Subclavian steal syndrome
Pulmonary embolism
Other / Multifactorial
Vestibular migraine
Persistent postural-perceptual dizziness
Anxiety and panic disorder
Medication effects
Anemia
Hypoglycemia
Hyperventilation
Cervicogenic dizziness (controversial)
Drug-Induced Vertigo and Dizziness
| Drug or Drug Class | Mechanism | Characteristics | Time to Resolution After Stopping |
|---|---|---|---|
| Aminoglycoside antibiotics (gentamicin, streptomycin, tobramycin) | Vestibular hair cell destruction; may be bilateral | Oscillopsia, imbalance; may be permanent; hearing may be preserved (gentamicin relatively vestibulotoxic) or lost (streptomycin) | Often permanent; partial compensation possible |
| Antihypertensives (alpha-blockers, diuretics, vasodilators, ACE inhibitors) | Orthostatic hypotension | Lightheadedness on standing; worse with dehydration or heat | Days to weeks after dose reduction |
| Anticonvulsants (phenytoin, carbamazepine, gabapentin) | Cerebellar toxicity at high levels; central vestibular suppression | Ataxia, nystagmus, dysarthria; dose-related | Days after dose reduction; permanent cerebellar damage possible with chronic phenytoin toxicity |
| Benzodiazepines and sedatives | Central nervous system depression; impaired vestibular compensation | Lightheadedness, imbalance; may delay recovery from vestibular lesions | Days to weeks; may unmask prior vestibular deficit |
| Selective serotonin reuptake inhibitors (initiation or withdrawal) | Serotonin effects on vestibular nuclei; withdrawal syndrome | Dizziness common during initiation and withdrawal; “brain zaps” on discontinuation | 1–2 weeks after initiation; withdrawal may last weeks |
| Loop diuretics (furosemide, especially with aminoglycosides) | Ototoxicity; potentiates aminoglycoside toxicity | Hearing loss and vestibular dysfunction; synergistic toxicity | May be permanent |
| Cisplatin and other chemotherapy | Vestibular and cochlear hair cell damage | Bilateral vestibular loss, hearing loss; dose-dependent | Usually permanent |
| Salicylates (aspirin at high doses) | Ototoxicity at toxic levels | Tinnitus, hearing loss, dizziness; reversible | 24–72 hours after stopping |
| Phosphodiesterase-5 inhibitors (sildenafil, tadalafil) | Vasodilation, possible effects on inner ear blood flow | Lightheadedness, flushing; rare sudden hearing loss | Hours after dose |
| Alcohol | Acute: density changes in cupula; Chronic: cerebellar degeneration | Positional vertigo when intoxicated; ataxia with chronic use | Acute: hours; Chronic cerebellar damage: permanent |
Quick Reference: “If You See This, Think This”
| Clinical Clue | Think This First | Next Step |
|---|---|---|
| Vertigo lasting seconds, triggered by rolling over or looking up | Benign paroxysmal positional vertigo | Dix-Hallpike test; treat with Epley maneuver |
| Acute continuous vertigo for days, no hearing loss, no neurological signs | Vestibular neuritis | Confirm peripheral HINTS pattern; supportive care and vestibular rehabilitation |
| Acute vertigo with normal head impulse test | Posterior circulation stroke | Urgent MRI with diffusion-weighted imaging; neurology consultation |
| Episodic vertigo with fluctuating hearing loss and tinnitus | Meniere disease | Audiometry; otolaryngology referral |
| Episodic vertigo with migraine history or features | Vestibular migraine | Apply diagnostic criteria; trial of migraine prophylaxis |
| Chronic dizziness worse in busy visual environments | Persistent postural-perceptual dizziness | Vestibular rehabilitation; consider SSRI; cognitive behavioral therapy |
| Lightheadedness on standing, improves lying down | Orthostatic hypotension | Orthostatic vital signs; review medications |
| Progressive unilateral hearing loss with mild imbalance | Vestibular schwannoma | MRI internal auditory canals with gadolinium |
| Oscillopsia (visual blurring with head movement) and imbalance | Bilateral vestibulopathy | Review for ototoxic medication exposure; vestibular function testing |
| Vertigo triggered by loud sounds | Superior semicircular canal dehiscence | High-resolution CT temporal bones |
6. Diagnostic Investigations
A stepwise, cost-effective approach guided by clinical presentation
The investigation of vertigo and dizziness should be guided by the clinical syndrome identified through history and examination. Most peripheral vestibular disorders (benign paroxysmal positional vertigo, vestibular neuritis) are diagnosed clinically and require no routine investigations. Testing is indicated when the diagnosis is uncertain, when central pathology is suspected, or when specific conditions require confirmation.
Key Principle: Clinical Diagnosis First
Most vestibular disorders are diagnosed at the bedside. Testing should confirm or refine clinical suspicion, not replace careful history and examination.
- Benign paroxysmal positional vertigo: No investigation needed if classic Dix-Hallpike positive
- Vestibular neuritis: No investigation needed if peripheral HINTS pattern confirmed
- Orthostatic hypotension: Diagnosis made with orthostatic vital signs
Baseline Investigations: When Diagnosis Is Uncertain
| Investigation | Purpose | What to Look For | Practical Points |
|---|---|---|---|
| Complete blood count | Screen for anemia, infection | Hemoglobin less than 10 g/dL may cause lightheadedness; elevated white cell count suggests infection | Low yield in isolated vertigo; more useful for nonspecific dizziness |
| Basic metabolic panel | Electrolytes, glucose, renal function | Hyponatremia, hypoglycemia, uremia can cause dizziness | Check in elderly, diabetics, those on diuretics |
| Thyroid function tests | Exclude thyroid dysfunction | Both hyperthyroidism and hypothyroidism can cause dizziness | Consider in chronic nonspecific dizziness |
| Electrocardiogram | Screen for arrhythmia, conduction abnormalities | Atrial fibrillation, heart block, prolonged QT, pre-excitation | Essential if presyncope; single ECG may miss paroxysmal arrhythmias |
| Orthostatic vital signs | Diagnose orthostatic hypotension | Systolic drop greater than 20 mmHg or diastolic drop greater than 10 mmHg within 3 minutes of standing | Must be measured properly: supine for 5 minutes, then standing measurements at 1 and 3 minutes |
Neuroimaging
When to Order Urgent Brain Imaging
Indications for Emergent Imaging
- Acute vestibular syndrome with HINTS central pattern (normal head impulse, direction-changing nystagmus, or skew deviation)
- Any focal neurological deficit accompanying vertigo
- Severe headache with vertigo
- Decreased level of consciousness
- Signs of increased intracranial pressure
- Recent significant head trauma
| Imaging Modality | Best For | Limitations | Practical Notes |
|---|---|---|---|
| MRI brain with diffusion-weighted imaging | Posterior circulation stroke, brainstem lesions, cerebellar pathology, multiple sclerosis plaques | May miss small infarcts in first 24–48 hours (sensitivity approximately 80% early); false negatives occur | Modality of choice for central pathology; HINTS examination is more sensitive than early MRI for stroke in acute vestibular syndrome |
| MRI internal auditory canals with gadolinium | Vestibular schwannoma (acoustic neuroma), other cerebellopontine angle lesions | Does not assess vestibular function, only structure | Indicated for asymmetric sensorineural hearing loss, unilateral tinnitus, or suspected tumor |
| CT head without contrast | Cerebellar hemorrhage, large infarcts, acute trauma | Poor for posterior fossa (bone artifact); misses most strokes and all small lesions | Use when MRI unavailable and hemorrhage or large lesion suspected; inferior to MRI for posterior fossa |
| CT temporal bones (high-resolution) | Superior semicircular canal dehiscence, cholesteatoma, temporal bone fracture | Does not show soft tissue or neural structures well | Specific indication needed; not a general screening test |
| CT angiography or MR angiography | Vertebral artery dissection, vertebrobasilar stenosis | May miss subtle dissections; requires contrast | Consider in young patients with stroke symptoms, neck pain, or recent trauma/manipulation |
Audiometric Testing
Pure Tone Audiometry
Indications: Any vertigo with hearing symptoms; suspected Meniere disease; suspected vestibular schwannoma; labyrinthitis
Findings in Meniere disease: Low-frequency sensorineural hearing loss (rising audiogram); fluctuates between attacks; eventually progresses to flat loss
Findings in vestibular schwannoma: Asymmetric high-frequency sensorineural hearing loss; reduced speech discrimination out of proportion to pure tone loss
Tympanometry
Purpose: Assess middle ear function; identify conductive component
Indications: Suspected middle ear pathology, eustachian tube dysfunction, otosclerosis
Findings: Type B (flat) suggests effusion or perforation; Type C suggests eustachian tube dysfunction
Specialized Vestibular Function Testing
| Test | What It Measures | Indications | Interpretation |
|---|---|---|---|
| Videonystagmography or Electronystagmography | Records eye movements; includes caloric testing (ice water or air in ear canal stimulates horizontal canal) | Confirm unilateral vestibular hypofunction; evaluate chronic dizziness; pre-surgical assessment | Unilateral weakness greater than 20–25% indicates vestibular hypofunction on that side; bilateral weakness suggests bilateral vestibulopathy |
| Video head impulse test | Quantifies vestibulo-ocular reflex gain for each semicircular canal individually | Characterize vestibular loss; identify which canals are affected; monitor recovery | Gain less than 0.8 with corrective saccades indicates canal hypofunction; can identify patterns suggesting specific diagnoses |
| Vestibular evoked myogenic potentials (cervical and ocular) | Cervical: saccular function via sternocleidomastoid; Ocular: utricular function via inferior oblique | Superior canal dehiscence (enhanced responses); Meniere disease; vestibular neuritis localization | Low threshold and high amplitude in superior canal dehiscence; absent responses indicate otolith organ dysfunction |
| Rotary chair testing | Vestibulo-ocular reflex function across range of frequencies; tests both labyrinths together | Bilateral vestibulopathy; central versus peripheral differentiation; compensation assessment | Reduced gain indicates bilateral loss; phase lead may indicate peripheral lesion |
| Computerized dynamic posturography | Assesses balance using visual, vestibular, and somatosensory inputs systematically | Multifactorial dizziness; vestibular rehabilitation planning; functional overlay assessment | Pattern of deficits indicates which sensory systems are impaired; may identify non-physiological patterns |
Targeted Investigations by Suspected Etiology
If Suspecting Meniere Disease
First-Line Tests
- Audiometry: Low-frequency sensorineural hearing loss (250–1000 Hz); may fluctuate; eventually becomes flat
- MRI internal auditory canals: To exclude vestibular schwannoma as cause of unilateral symptoms
Second-Line Tests
- Electrocochleography: Elevated summating potential to action potential ratio greater than 0.4 suggests endolymphatic hydrops
- Vestibular evoked myogenic potentials: May show abnormalities supporting diagnosis
- MRI with intratympanic gadolinium: Can visualize endolymphatic hydrops directly (research tool becoming more available)
If Suspecting Vestibular Migraine
Primarily a Clinical Diagnosis
- Diagnostic criteria: At least 5 episodes of vestibular symptoms lasting 5 minutes to 72 hours; current or previous migraine; migraine features during at least 50% of vestibular episodes
- Audiometry: Usually normal; may show mild fluctuation
Tests to Exclude Alternatives
- MRI brain: To exclude structural lesion if atypical features
- Vestibular function tests: May show interictal vestibular dysfunction in some patients
If Suspecting Posterior Circulation Stroke
Urgent Tests
- MRI brain with diffusion-weighted imaging: Sensitivity approximately 80% in first 24 hours, increases to greater than 95% at 72 hours
- MR angiography or CT angiography: Evaluate vertebrobasilar system for stenosis or dissection
- ECG: Screen for atrial fibrillation
Additional Workup
- Echocardiography: Evaluate for cardiac source of embolism
- Holter monitor: If paroxysmal atrial fibrillation suspected
- Lipid panel, HbA1c: Assess vascular risk factors
- Hypercoagulability workup: In young patients without traditional risk factors
If Suspecting Superior Semicircular Canal Dehiscence
Diagnostic Tests
- High-resolution CT temporal bones: Demonstrates dehiscence of bone over superior canal; requires thin cuts (0.5 mm) and reformation in planes of canals
- Cervical vestibular evoked myogenic potentials: Reduced threshold (often less than 70 dB) and increased amplitude on affected side
Supporting Tests
- Audiometry: May show air-bone gap at low frequencies despite normal tympanometry (pseudo-conductive loss)
- Ocular vestibular evoked myogenic potentials: Enhanced responses
Cardiac Investigations for Presyncope
| Test | Purpose | When to Order | Key Findings |
|---|---|---|---|
| 12-lead ECG | Screen for arrhythmia, conduction disease, structural abnormalities | All patients with presyncope | Atrial fibrillation, heart block, pre-excitation, prolonged QT, Brugada pattern |
| Holter monitor (24–48 hours) | Capture intermittent arrhythmias | Frequent symptoms (daily or near-daily) | Correlate rhythm with symptoms; identify pauses, tachyarrhythmias |
| Event recorder (2–4 weeks) | Patient-activated recording during symptoms | Less frequent symptoms (weekly) | Allows symptom-rhythm correlation over longer period |
| Implantable loop recorder | Long-term monitoring (up to 3 years) | Infrequent but concerning symptoms; unexplained syncope | May detect rare but significant arrhythmias |
| Echocardiography | Assess cardiac structure and function | Suspected structural heart disease; murmur on examination | Aortic stenosis, cardiomyopathy, valvular disease |
| Tilt table testing | Reproduce vasovagal syncope or orthostatic intolerance | Recurrent syncope or presyncope without clear cause | Vasovagal response (hypotension and/or bradycardia), postural orthostatic tachycardia syndrome |
Empiric Treatment Trials as Diagnostic Tools
When Clinical Diagnosis Is Probable but Not Certain
Response to treatment can support the diagnosis when testing is inconclusive or unavailable:
- Suspected benign paroxysmal positional vertigo: Epley maneuver is both diagnostic and therapeutic. Resolution after one or two treatments confirms the diagnosis.
- Suspected vestibular migraine: Trial of migraine prophylaxis (such as amitriptyline 10–25 mg nightly or propranolol 40–80 mg daily) for 2–3 months. Greater than 50% reduction in episodes supports diagnosis.
- Suspected Meniere disease: Low-sodium diet (less than 2 g daily) and diuretic trial. Reduced attack frequency supports diagnosis.
- Suspected persistent postural-perceptual dizziness: Trial of sertraline 25–50 mg daily with vestibular rehabilitation. Gradual improvement over 8–12 weeks supports diagnosis.
- Suspected vestibular paroxysmia: Trial of carbamazepine or oxcarbazepine. Response supports diagnosis of neurovascular compression.
Investigation Summary by Clinical Presentation
| Presentation | If Peripheral Pattern | If Central Concern |
|---|---|---|
| Acute vestibular syndrome | No imaging needed if classic peripheral HINTS; audiometry if hearing symptoms | Urgent MRI with diffusion-weighted imaging; neurology consultation; vascular workup |
| Episodic positional vertigo | No testing needed if classic Dix-Hallpike positive; treat with repositioning maneuver | MRI brain if atypical nystagmus or non-fatigable; CT temporal bones if superior canal dehiscence suspected |
| Spontaneous episodic vertigo | Audiometry; MRI internal auditory canals if asymmetric hearing | MRI brain; consider MRA if vascular risk factors and brief episodes |
| Chronic dizziness | Vestibular function testing; audiometry; consider MRI if progressive | MRI brain; comprehensive vestibular testing; evaluate for multiple contributing factors |
| Presyncope | Not applicable (not a vestibular pattern) | ECG; orthostatic vital signs; consider Holter, echocardiography, tilt table |
7. Pattern Recognition and Clinical Decision-Making
Practical algorithms and decision pathways for vertigo and dizziness
Step 1: Is This Urgent?
The first priority is identifying patients who require emergent evaluation. Use the following triage framework:
| Clinical Scenario | Urgency Level | Immediate Action |
|---|---|---|
| Acute vertigo with focal neurological deficits (diplopia, dysarthria, dysphagia, weakness, sensory loss, ataxia out of proportion to vertigo) | EMERGENT | Activate stroke protocol; urgent MRI with diffusion-weighted imaging; neurology consultation; consider thrombolysis if within window |
| Acute vestibular syndrome with HINTS central pattern (normal head impulse test, direction-changing nystagmus, or skew deviation) | EMERGENT | Treat as posterior circulation stroke until proven otherwise; urgent MRI; admit for observation even if MRI initially negative |
| Vertigo with severe headache | EMERGENT | Consider cerebellar hemorrhage, vertebral artery dissection, or subarachnoid hemorrhage; urgent CT then MRI; neurosurgical consultation if hemorrhage |
| Vertigo with sudden hearing loss | URGENT | Consider anterior inferior cerebellar artery stroke or sudden sensorineural hearing loss; urgent audiology; MRI; otolaryngology referral; steroids within 24–48 hours if idiopathic sudden hearing loss |
| Acute vestibular syndrome with peripheral HINTS pattern (abnormal head impulse, unidirectional nystagmus, no skew) | URGENT | Likely vestibular neuritis; symptomatic treatment; arrange vestibular rehabilitation; can often manage as outpatient if tolerating oral intake |
| Episodic positional vertigo with classic features | ROUTINE | Perform Dix-Hallpike and treat with appropriate repositioning maneuver; outpatient follow-up |
| Chronic dizziness without red flags | ROUTINE | Comprehensive outpatient evaluation; vestibular rehabilitation referral; consider specialty consultation |
Step 2: Classify by Temporal Pattern
After excluding emergencies, categorize the presentation to guide the diagnostic pathway:
Acute Continuous (Days)
Definition: Single episode of vertigo lasting more than 24 hours, still ongoing or recently resolved
Key question: Peripheral or central?
→ Proceed to Algorithm A: HINTS Examination
Episodic (Seconds to Hours)
Definition: Recurrent discrete episodes with return to baseline between attacks
Key question: Triggered or spontaneous?
→ Proceed to Algorithm B: Episodic Vertigo Pathway
Chronic Persistent (Months)
Definition: Symptoms present most days for 3 or more months
Key question: What is perpetuating the symptoms?
→ Proceed to Algorithm C: Chronic Dizziness Evaluation
Step 3: Follow the Appropriate Algorithm
Algorithm A: Acute Vestibular Syndrome
| HINTS Finding | Interpretation | Action |
|---|---|---|
| Abnormal head impulse test (corrective saccade toward affected side) + Unidirectional nystagmus + No skew deviation | Peripheral pattern — likely vestibular neuritis | Symptomatic treatment (antiemetics, short-term vestibular suppressants); early vestibular rehabilitation; outpatient management if stable; audiometry if any hearing concern |
| Normal head impulse test (no corrective saccade) in patient with acute vestibular syndrome | Central pattern — posterior circulation stroke until proven otherwise | Urgent MRI with diffusion-weighted imaging; admit; stroke workup; neurology consultation |
| Direction-changing nystagmus (beats right with right gaze, left with left gaze) | Central pattern | Urgent MRI; stroke workup; neurology consultation |
| Skew deviation present (vertical eye misalignment on alternate cover test) | Central pattern — indicates brainstem lesion | Urgent MRI; stroke workup; neurology consultation |
| Severe gait ataxia (unable to walk even with assistance) | Central pattern — suggests cerebellar involvement | Urgent MRI; neurosurgical consultation if cerebellar edema or hemorrhage |
Critical Caveat: MRI Limitations
Early MRI (within 24–48 hours) can miss up to 20% of posterior circulation strokes, particularly small cerebellar infarcts. If clinical suspicion is high based on HINTS central pattern or other features, treat as stroke even if initial MRI is negative. Consider repeat imaging in 3–5 days or admission for observation.
Algorithm B: Episodic Vertigo
| Clinical Scenario | Most Likely Diagnosis | Action |
|---|---|---|
| Episodes lasting 10–60 seconds, triggered by rolling over in bed or looking up, no hearing symptoms | Benign paroxysmal positional vertigo (posterior canal) | Confirm with Dix-Hallpike test; treat with Epley maneuver; patient education on home exercises (Brandt-Daroff or self-Epley) |
| Episodes lasting seconds, triggered by turning head while lying flat, horizontal nystagmus | Benign paroxysmal positional vertigo (horizontal canal) | Confirm with supine roll test; treat with Lempert (barbecue roll) or Gufoni maneuver depending on variant |
| Episodes lasting 20 minutes to hours, with fluctuating hearing loss, tinnitus, aural fullness | Meniere disease | Audiometry; low-sodium diet (less than 2 g daily); consider diuretic; otolaryngology referral; vestibular rehabilitation between attacks |
| Episodes lasting minutes to hours, migraine history or migraine features, no hearing loss | Vestibular migraine | Apply diagnostic criteria; migraine lifestyle modifications; consider prophylaxis (amitriptyline, propranolol, topiramate); treat acute episodes as migraine |
| Episodes lasting seconds to minutes, triggered by loud sounds or pressure changes, autophony | Superior semicircular canal dehiscence | High-resolution CT temporal bones; vestibular evoked myogenic potentials; otolaryngology referral; surgery for severe cases |
| Lightheadedness (not spinning) on standing, resolves with lying down | Orthostatic hypotension | Orthostatic vital signs; review medications; assess volume status; increase fluids and salt; compression stockings; consider fludrocortisone or midodrine if persistent |
| Brief episodes with palpitations, near-syncope, no positional trigger | Cardiac arrhythmia | ECG; Holter or event monitor; echocardiography if structural disease suspected; cardiology referral |
Algorithm C: Chronic Dizziness
| Clinical Scenario | Most Likely Diagnosis | Action |
|---|---|---|
| Chronic dizziness worse with upright posture and complex visual environments; often began after an acute vestibular event; normal vestibular examination | Persistent postural-perceptual dizziness | Vestibular rehabilitation (habituation exercises); SSRI trial (sertraline 25–50 mg); cognitive behavioral therapy; patient education that this is treatable |
| Chronic imbalance following acute vertigo; residual vestibular hypofunction on testing | Uncompensated unilateral vestibular loss | Vestibular rehabilitation (gaze stabilization and balance exercises); discontinue vestibular suppressants; encourage activity |
| Oscillopsia (visual blurring with head movement); imbalance worse in the dark; history of ototoxic exposure | Bilateral vestibulopathy | Vestibular function testing to confirm; vestibular rehabilitation; assistive devices; avoid further ototoxic exposure |
| Progressive unilateral hearing loss and tinnitus; mild imbalance | Vestibular schwannoma | MRI internal auditory canals with gadolinium; otolaryngology and neurosurgery referral; treatment options include observation, radiation, or surgery |
| Dizziness in context of multiple medications, particularly in elderly patient | Medication-induced or multifactorial dizziness | Comprehensive medication review; reduce polypharmacy; address orthostatic hypotension; assess for multiple contributing factors |
| Chronic dizziness with prominent anxiety or panic symptoms; avoidance behaviors | Anxiety-related dizziness or comorbid psychiatric disorder | Screen for anxiety and depression; SSRI trial; cognitive behavioral therapy; vestibular rehabilitation if vestibular component; avoid benzodiazepines long-term |
“What Do I Do If…” Decision Reference
| Clinical Situation | Immediate Action | Next Step |
|---|---|---|
| HINTS suggests stroke but MRI is negative | Admit for observation; treat as presumed stroke | Repeat MRI in 3–5 days; complete vascular workup; neurology follow-up |
| Epley maneuver does not work after 2–3 attempts | Reconsider diagnosis; check for horizontal canal variant | Perform supine roll test; consider atypical BPPV or central positional vertigo; refer to vestibular specialist |
| Patient has both Meniere disease features AND migraine features | Treat the more disabling condition first | Low-sodium diet; consider migraine prophylaxis; audiometry; may have both conditions; specialist referral if unclear |
| Elderly patient on multiple medications with dizziness | Check orthostatic vital signs; review medication list | Deprescribe where possible; address blood pressure medications, sedatives, anticholinergics first; falls risk assessment |
| Patient with vestibular neuritis not improving after 2 weeks | Discontinue vestibular suppressants; ensure vestibular rehabilitation started | Consider vestibular function testing; evaluate for inadequate compensation; rule out persistent postural-perceptual dizziness development |
| Patient requests imaging but has classic BPPV | Explain clinical diagnosis; treat with repositioning maneuver | Imaging not needed if classic presentation and complete response to treatment; image only if red flags or atypical features |
| Vertigo with sudden hearing loss | Urgent audiometry; consider labyrinthine stroke or sudden sensorineural hearing loss | MRI to rule out stroke and vestibular schwannoma; if idiopathic, start steroids within 24–48 hours (prednisone 60 mg daily or intratympanic dexamethasone) |
Troubleshooting Refractory Vertigo and Dizziness
When Treatment Fails, Ask These Questions
- Is the diagnosis correct? Reconsider atypical presentations; vestibular migraine and Meniere disease can overlap; central causes can mimic peripheral
- Are there multiple contributing factors? Elderly patients often have vestibular hypofunction PLUS orthostatic hypotension PLUS medication effects PLUS anxiety
- Has persistent postural-perceptual dizziness developed? Common after any vestibular event; requires specific treatment approach
- Is there psychiatric comorbidity? Anxiety and depression worsen dizziness and impair compensation; screen and treat
- Is the patient taking vestibular suppressants long-term? These impair central compensation; should be stopped after acute phase
- Has vestibular rehabilitation been adequate? Ensure patient is actively participating; may need supervised therapy; exercises must be challenging enough
- Are medications contributing? Review for vestibulotoxic drugs, sedatives, antihypertensives causing orthostasis
- Is there an occult central lesion? Consider MRI if not previously done; slow-growing tumors may present with chronic symptoms
8. Clinical Pearls and Pitfalls
Practical wisdom — learn from successes and avoid common mistakes
Must-Know Clinical Pearls
Timing and triggers trump symptom quality: Asking “How long does each episode last?” and “What brings it on?” is far more diagnostically useful than asking patients to describe the quality of their dizziness. Patients struggle to distinguish vertigo from lightheadedness, but they can tell you if it lasts seconds versus hours.
HINTS beats MRI for acute vestibular syndrome: In the hands of a trained examiner, the HINTS examination is more sensitive than early MRI for detecting posterior circulation stroke. A normal head impulse test in acute vestibular syndrome should trigger stroke workup, not reassurance.
Benign paroxysmal positional vertigo is curable at the bedside: A single Epley maneuver resolves symptoms in 70–80% of patients with posterior canal involvement. This is one of the most satisfying diagnoses in medicine—the patient can walk out symptom-free.
Vestibular migraine is common and underdiagnosed: It is likely the most common cause of episodic vertigo. Many patients do not have headache during vestibular episodes. Ask about migraine history, motion sickness, and photophobia/phonophobia during episodes.
Vestibular rehabilitation works: For uncompensated vestibular loss and persistent postural-perceptual dizziness, vestibular rehabilitation is first-line treatment with excellent evidence. Early referral accelerates recovery.
Persistent postural-perceptual dizziness is real and treatable: This functional vestibular disorder follows an initial vestibular insult and represents maladaptive central processing, not malingering. SSRI therapy (particularly sertraline) combined with vestibular rehabilitation and cognitive behavioral therapy is effective.
Always check orthostatic vital signs: Orthostatic hypotension is extremely common, especially in elderly patients on antihypertensives. It is easy to diagnose, easy to treat, and frequently missed.
Sudden hearing loss is an emergency: Sudden sensorineural hearing loss with or without vertigo requires urgent evaluation and treatment with steroids within 24–48 hours for best outcomes. Do not wait for outpatient audiology.
Critical Pitfalls to Avoid
Trusting a negative MRI in acute vestibular syndrome: Up to 20% of posterior circulation strokes are missed by MRI in the first 48 hours, especially small cerebellar infarcts. If HINTS suggests central pathology, treat as stroke regardless of initial imaging.
Using HINTS for the wrong presentation: HINTS is validated only for acute vestibular syndrome (continuous vertigo for more than 24 hours). Using it for brief episodic vertigo or chronic dizziness will not provide useful information and may be misleading.
Prescribing long-term vestibular suppressants: Meclizine, dimenhydrinate, and benzodiazepines impair central vestibular compensation. They are appropriate for acute symptom relief (first 2–3 days) but should be stopped thereafter. Long-term use perpetuates symptoms.
Diagnosing “labyrinthitis” without hearing symptoms: True labyrinthitis involves both vestibular and cochlear structures, so hearing loss or tinnitus should be present. Isolated vertigo without hearing symptoms is vestibular neuritis, not labyrinthitis.
Attributing dizziness to “cervical vertigo” without strong evidence: True cervicogenic dizziness is rare and controversial. Most patients diagnosed with this actually have benign paroxysmal positional vertigo, vestibular migraine, or persistent postural-perceptual dizziness. Neck manipulation carries stroke risk and is not indicated for vertigo.
Missing posterior circulation stroke because patient “looks too well”: Unlike anterior circulation strokes with obvious hemiparesis, posterior circulation strokes can present with isolated vertigo and minimal findings. Vascular risk factors should lower the threshold for imaging.
Assuming severe symptoms mean serious pathology: Patients with vestibular neuritis can appear extremely ill with intractable vomiting and inability to stand—yet this is a benign, self-limited condition. Conversely, a patient with cerebellar stroke may have milder symptoms. Pattern recognition, not symptom severity, distinguishes central from peripheral causes.
Dismissing chronic dizziness as “just anxiety”: While anxiety is commonly comorbid with dizziness (and can be the primary cause), many patients have legitimate vestibular pathology that is worsening their anxiety. Both conditions need to be addressed. A dismissive approach damages the therapeutic relationship and delays appropriate treatment.
Key Takeaways
- Classify by temporal pattern first: Acute continuous (days), episodic (seconds to hours), or chronic persistent (months)—this determines your differential and workup
- Duration is the most discriminating historical feature: Seconds suggests benign paroxysmal positional vertigo; minutes to hours suggests Meniere disease or vestibular migraine; days suggests vestibular neuritis or stroke; chronic suggests persistent postural-perceptual dizziness or bilateral vestibulopathy
- For acute vestibular syndrome, perform HINTS: Head Impulse, Nystagmus, Test of Skew—this bedside examination is more sensitive than early MRI for posterior circulation stroke
- A normal head impulse test in acute vestibular syndrome is a red flag: It suggests central pathology and should prompt urgent imaging and stroke workup
- Benign paroxysmal positional vertigo is diagnosed and treated at the bedside: Dix-Hallpike test confirms the diagnosis; Epley maneuver provides immediate cure in most cases
- Vestibular migraine is common: Consider it in any patient with episodic vertigo and migraine history or features, even without headache during vestibular episodes
- Stop vestibular suppressants after the acute phase: Long-term use of meclizine or benzodiazepines impairs central compensation and perpetuates symptoms
- Vestibular rehabilitation is evidence-based first-line treatment: Refer early for uncompensated vestibular loss and persistent postural-perceptual dizziness
- Chronic dizziness is often multifactorial: In elderly patients especially, look for multiple contributing factors including vestibular, cardiovascular, medication, and psychiatric components
- Sudden hearing loss with vertigo is urgent: Consider anterior inferior cerebellar artery stroke or sudden sensorineural hearing loss—both require prompt action
Quick Reference Algorithm
Systematic Approach to Vertigo and Dizziness:
- Identify emergencies: Focal neurological deficits, severe headache, altered consciousness, or HINTS central pattern → urgent imaging and stroke workup
- Classify by temporal pattern: Acute continuous, episodic, or chronic persistent
- For acute vestibular syndrome: Perform HINTS examination to distinguish peripheral (vestibular neuritis) from central (stroke) causes
- For episodic vertigo: Determine if triggered (positional → Dix-Hallpike) or spontaneous (→ consider Meniere disease, vestibular migraine, cardiac)
- For chronic dizziness: Identify perpetuating factors including uncompensated vestibular loss, persistent postural-perceptual dizziness, medications, and psychiatric comorbidity
- Treat the underlying cause: Repositioning maneuvers for BPPV; vestibular rehabilitation for vestibular hypofunction and persistent postural-perceptual dizziness; migraine prophylaxis for vestibular migraine; dietary modification and diuretics for Meniere disease
- Address all contributing factors: Stop vestibular suppressants after acute phase; treat anxiety and depression; review and reduce polypharmacy in elderly