Diagnostic Evaluation and Management of Vertigo

Introduction to Vertigo Diagnosis

• The American Academy of Otolaryngology-Head and Neck Surgery suggests that patients with rotational vertigo, nausea, vomiting, and bilateral ear blockage should undergo audiometry and tympanometry as part of their diagnostic evaluation 1
• Vertigo accounts for 42% of vertigo cases in non-specialty settings, vestibular neuritis accounts for 41%, Menière's disease accounts for 10%, and vascular causes account for 3% 2
• Migraine-associated vertigo is responsible for up to 14% of vertigo cases 3

Audiometry and Vestibular Disorders

• Audiometry is essential for documenting low-to-midfrequency sensorineural hearing loss required for Ménière's disease diagnosis, and helps differentiate between various causes of vertigo that present with hearing symptoms 1
• The American Academy of Otolaryngology-Head and Neck Surgery recommends audiometric evaluation for patients with vertigo and ear fullness/blockage to rule out conditions like Ménière's disease 1
• Autoimmune Inner Ear Disease often presents with progressive fluctuating bilateral hearing loss 4

Specific Vestibular Disorders

• Ménière's Disease is characterized by episodic vertigo, fluctuating hearing loss, tinnitus, and aural fullness, with definitive diagnosis requiring audiometrically documented low-to-midfrequency sensorineural hearing loss 1
• Labyrinthitis presents with sudden severe vertigo with profound hearing loss and prolonged vertigo, with audiometry helping to document the extent of hearing loss 1
• BPPV is a common cause of vertigo, with a high recurrence risk of 10-18% at 1 year and up to 36% long-term 3

Diagnostic Approach

• For patients with vertigo and ear fullness/blockage, the American Academy of Otolaryngology-Head and Neck Surgery suggests performing audiometry to document any hearing loss, and conducting tympanometry to assess middle ear function 1
• If audiometry shows low-to-midfrequency sensorineural hearing loss and symptoms match criteria, consider Ménière's disease 1
• If audiometry is normal but symptoms persist, consider vestibular migraine or evaluate for BPPV using positional testing (Dix-Hallpike) 1
• The HINTS examination (Head-Impulse, Nystagmus, Test of Skew) is more sensitive than early MRI for detecting stroke (100% vs 46%) in patients with vertigo, and is useful in distinguishing peripheral from central causes of vertigo, as recommended by the American College of Radiology 5, 3

• The American College of Radiology recommends the following imaging tests:

  | Condition | Imaging Test | | --- | --- | | Peripheral Vertigo | CT temporal bone without contrast or MRI head/internal auditory canal without/with contrast | | Central Vertigo | MRI head/internal auditory canal without/with contrast | 6

Treatment and Management

• The American Academy of Otolaryngology-Head and Neck Surgery recommends canalith repositioning procedures (CRPs), specifically the Epley or Semont maneuver, as the primary evidence-based treatment for BPPV, with 80-90% success rates after 1-2 treatments 2, 3
• Vestibular rehabilitation exercises may be offered as self-administered or clinician-guided therapy for patients with BPPV, particularly beneficial for elderly patients, and may decrease recurrence rates 2, 3
• Observation with follow-up may be offered as initial management for patients with BPPV 2
• The American Academy of Otolaryngology-Head and Neck Surgery recommends against routinely treating BPPV with vestibular suppressant medications such as antihistamines or benzodiazepines 2
• Vestibular suppressants, such as antihistamines, benzodiazepines, and dopamine receptor antagonists, may be used for acute vertigo attacks, but long-term use can delay vestibular compensation 7, 8
• A short course of oral corticosteroids, such as prednisone or methylprednisolone, for 7-14 days with tapering dose may be beneficial in reducing inflammation and improving outcomes 8
• Prokinetic antiemetics, such as domperidone and metoclopramide, may be useful adjuncts for managing nausea and vomiting during vertigo attacks, without significantly interfering with vestibular compensation, with a strength of evidence of moderate to high 2, 9
• Diuretics can reduce endolymph volume and vertigo attacks by 56% compared to placebo 6
• Medications such as dopamine receptor antagonists (e.g., prochlorperazine, metoclopramide), lorazepam, and combination therapy with a 5-HT3 antagonist (e.g., ondansetron) may be considered for patients with dizziness, as recommended by the American Academy of Neurology and the National Comprehensive Cancer Network 10
• Beta-blockers, anticonvulsants, or antidepressants may be used for prophylaxis in vestibular migraine, as recommended by the Mayo Clinic 11
• Transtympanic gentamicin may be considered for refractory cases with non-usable hearing, as recommended by the American Academy of Otolaryngology-Head and Neck Surgery, with a citation from 2020 1

Patient Education and Follow-up

• Patients with BPPV should be counseled about the high recurrence risk and educated about recognizing recurrence symptoms for prompt treatment 3
• The American Academy of Otolaryngology-Head and Neck Surgery suggests explaining the BPPV mechanism, discussing fall prevention strategies, and reviewing warning signs requiring further evaluation, as well as providing reassurance about the generally favorable prognosis and explaining the possibility of recurrence and importance of follow-up 2, 3
• Home safety assessment is crucial to prevent falls in patients with vertigo, as recommended by the American Academy of Otolaryngology-Head and Neck Surgery 2
• Reassess patients within 1 month after initial treatment to confirm symptom resolution 2
• Avoid unnecessary imaging, such as radiographic imaging or vestibular testing, unless diagnosis is uncertain or additional symptoms warrant testing 2