Approach to Managing a Patient Presenting with Dizziness

Initial Categorization and Diagnosis

The American Academy of Otolaryngology-Head and Neck Surgery recommends categorizing dizziness by timing and triggers to determine the specific vestibular syndrome and guide targeted physical examination and management 1, 2
Acute Vestibular Syndrome (AVS) is characterized by acute persistent dizziness lasting days to weeks with constant symptoms, and requires a key examination: HINTS (Head Impulse, Nystagmus, Test of Skew) to differentiate peripheral from central causes 1, 2
HINTS has 100% sensitivity for posterior circulation stroke when performed by trained practitioners, superior to early MRI (46% sensitivity) 2
A critical pitfall is that 75-80% of patients with posterior circulation stroke have NO focal neurologic deficits, so a normal neurologic exam does NOT exclude stroke 2, 3

The American Academy of Otolaryngology-Head and Neck Surgery recommends focusing on duration and onset, triggers, and associated symptoms such as hearing loss, tinnitus, headache, and neurologic symptoms to determine the underlying cause of dizziness 1, 2, 4
A complete neurologic examination including cranial nerves, cerebellar testing, and gait assessment is essential for all patients presenting with dizziness 1, 2
The Dix-Hallpike maneuver and supine roll test should be performed for suspected BPPV, and the HINTS examination should be performed for AVS (only if trained) 1, 2, 5

The American Academy of Otolaryngology-Head and Neck Surgery recommends MRI brain (without contrast, with diffusion-weighted imaging) for patients with abnormal neurologic examination, HINTS examination suggesting central cause, high vascular risk patients with acute vestibular syndrome, unilateral tinnitus or pulsatile tinnitus, asymmetric hearing loss, and focal neurological deficits 1, 2, 4, 6
Red flags requiring urgent evaluation include focal neurological deficits, sudden hearing loss, inability to stand or walk, downbeating nystagmus or other central nystagmus patterns, and new severe headache 1, 2, 3, 5

The American Academy of Otolaryngology-Head and Neck Surgery recommends canalith repositioning procedures (Epley maneuver) as first-line treatment for BPPV, and educates patients about the 10-18% recurrence rate at 1 year, up to 36% long-term 1, 2, 6
For Ménière's disease, salt restriction and diuretics are recommended, and intratympanic treatments should be considered for refractory cases 2
For vestibular migraine, migraine prophylaxis and lifestyle modifications are recommended 2, 3

The European Society of Cardiology recommends that if a patient is on guideline-directed medical therapy (GDMT) for heart failure with reduced ejection fraction, dizziness is unlikely related to HF therapy, and other etiologies such as BPPV, vestibular disorders, or valvular disease should be considered 7
Common pitfalls to avoid include relying on symptom quality, assuming normal neurologic exam excludes stroke, overuse of imaging, failing to perform Dix-Hallpike, using CT instead of MRI, and not assessing fall risk in elderly patients with vestibular disorders 1, 2, 3, 5, 6

In patients presenting with acute vestibular syndrome, approximately 25 % have a posterior‑circulation ischemic stroke, underscoring the need for careful assessment of vascular risk factors and red‑flag signs. American College of Radiology. 8

Computed tomography (CT) of the head provides < 1 % diagnostic yield for isolated dizziness and misses most posterior‑circulation infarcts, with a sensitivity of only 10–20 % for these strokes. American College of Radiology. 8
Magnetic resonance imaging (MRI) with diffusion‑weighted sequences improves detection, yielding a diagnostic rate of ≈ 4 %, still modest but markedly superior to CT’s < 1 % yield. American College of Radiology. 8

The HINTS (Head‑Impulse, Nystagmus, Test‑of‑Skew) bedside algorithm achieves 100 % sensitivity for identifying stroke when performed by clinicians with specific training; however, its accuracy declines markedly when used by untrained practitioners, emphasizing the importance of expertise. American College of Radiology. 8

All facts are presented in English, with patient‑specific details generalized to maintain privacy.