What is the recommended management for acute peripheral vertigo in adults, including treatment of BPPV, vestibular neuritis, and Meniere's disease, and indications for steroids or urgent neuroimaging?

Management of Acute Peripheral Vertigo in Adults

For acute peripheral vertigo, perform the Dix-Hallpike maneuver immediately and treat confirmed BPPV with the Epley repositioning maneuver on the spot—this achieves 80% resolution after 1-3 treatments and requires no imaging or medications in typical cases. 1, 2

Initial Diagnostic Approach

Classify by Timing Pattern

• Brief episodic vertigo (seconds to <1 minute) triggered by head position changes indicates BPPV, the most common cause accounting for 42% of all vertigo cases 3, 2
• Acute persistent vertigo (days to weeks) with continuous symptoms suggests vestibular neuritis (41% of peripheral cases) or labyrinthitis 3, 4
• Spontaneous episodic vertigo (minutes to hours) points to Meniere's disease or vestibular migraine 3

Execute the Dix-Hallpike Maneuver Bilaterally

• Move patient from seated to supine with head turned 45° to the tested side and extended 20° backward 1, 2
• Positive findings for BPPV: 5-20 second latency, torsional upbeating nystagmus toward the affected ear, crescendo-decrescendo pattern resolving within 60 seconds, fatigability with repeat testing 1, 4, 2
• If Dix-Hallpike is negative, perform the supine roll test to detect lateral canal BPPV (10-15% of cases) 3, 2

Treatment by Diagnosis

BPPV (Confirmed by Positive Dix-Hallpike)

• Perform the Epley canalith repositioning maneuver immediately upon diagnosis—do not delay treatment 1, 2
• Success rate: 80% after 1-3 treatments; 90-98% with additional maneuvers if initial treatment fails 1, 3, 2
• Do NOT prescribe vestibular suppressants (meclizine, dimenhydrinate, benzodiazepines) as they prevent central compensation and do not address the mechanical pathology 1, 2
• No imaging is required for typical BPPV with positive Dix-Hallpike and no red flags 3, 4
• Reassess within 1 month to document resolution or persistence 1, 3

Vestibular Neuritis

• Acute phase (first 24-48 hours): Short-term vestibular suppressants for severe nausea/vomiting only 5, 6
• Corticosteroids: Consider oral prednisone (1 mg/kg/day for 3 days, then taper over 10-14 days) if presenting within 72 hours of symptom onset 3, 6
• Early vestibular rehabilitation therapy (within 2-3 days) to promote central compensation—significantly improves gait stability compared to medication alone 1, 3
• Limit vestibular suppressants to 2-3 days maximum to avoid delaying compensation 1, 6

Meniere's Disease

• Diagnostic criteria require: ≥2 spontaneous vertigo episodes lasting 20 minutes to 12 hours, fluctuating low-to-mid frequency sensorineural hearing loss, fluctuating aural fullness and tinnitus 3, 4
• Obtain comprehensive audiometry to document the characteristic hearing pattern 3
• Acute attack management: Oral corticosteroids 3
• Maintenance therapy: Dietary sodium restriction (<1500-2000 mg/day), diuretics (hydrochlorothiazide 25 mg daily or acetazolamide) 3, 2, 6
• Refractory cases: Intratympanic gentamicin or dexamethasone 3, 6

Red Flags Requiring Urgent MRI Brain (Without Contrast)

Any of the following mandate immediate neuroimaging to exclude posterior circulation stroke: 3, 4

• Age >50 years with vascular risk factors (hypertension, diabetes, atrial fibrillation, prior stroke)—even with normal neurologic exam, as 11-25% harbor posterior circulation stroke 3
• Focal neurological deficits (dysarthria, limb weakness, sensory loss, diplopia, Horner's syndrome) 3, 4
• Severe postural instability with falling 3, 4
• New severe headache accompanying vertigo 3, 4
• Pure vertical or downbeating nystagmus without torsional component 3, 4
• Direction-changing nystagmus without head position changes 3, 4
• Baseline nystagmus present without provocative maneuvers 3, 4
• Normal head-impulse test (suggests central cause) 3
• Skew deviation on alternate cover testing 3
• Sudden unilateral hearing loss 3
• Failure to respond to appropriate peripheral vertigo treatments 1, 3

Note: 75-80% of posterior circulation strokes presenting with acute vestibular syndrome have NO focal neurologic deficits, so do not rely on neurologic exam alone 3

When NOT to Order Imaging

• Typical BPPV with positive Dix-Hallpike, no red flags, and normal neurologic exam—diagnostic yield of CT/MRI <1% 3, 4
• Acute persistent vertigo in patients <50 years without vascular risk factors, normal neurologic exam, and peripheral HINTS pattern by trained examiner 3

Critical Pitfalls to Avoid

• Do not rely on patient descriptions of "spinning" versus "lightheadedness"—focus on timing, triggers, and associated symptoms instead 3, 4
• Do not assume normal neurologic exam excludes stroke—posterior circulation infarcts frequently present without focal deficits 3
• Do not order CT head for suspected stroke—sensitivity is only 10-20% for posterior circulation infarcts; MRI with diffusion-weighted imaging is mandatory (4% diagnostic yield vs <1% for CT) 3, 7
• Do not perform HINTS examination unless specifically trained—when performed by non-experts, it has inadequate sensitivity and should not replace MRI in high-risk patients 3
• About 50% of BPPV patients describe symptoms as "lightheadedness" or "off-balance" rather than classic spinning—perform Dix-Hallpike even without typical vertigo description 3

Special Considerations for Elderly Patients

• BPPV increases fall risk 12-fold in elderly patients 1, 2
• 9% of elderly patients referred for geriatric evaluation have BPPV, with three-fourths having fallen in the prior 3 months 3
• Seniors may present with isolated instability rather than classic spinning vertigo 2
• Assess for modifying factors: impaired mobility, CNS disorders, lack of home support, polypharmacy 1, 2
• Counsel about home safety, activity restrictions until resolved, and need for supervision if frail 3

Follow-Up and Recurrence

• Reassess all patients within 1 month after initial treatment to document resolution or persistence 1, 3
• BPPV recurrence is more common after head trauma, vestibular neuritis, or in patients with coexisting Meniere's disease or migraine 1
• Educate patients about recurrence risk (up to 50% at 5 years), fall risk, and importance of returning promptly for repeat repositioning if symptoms recur 1, 2