Canal Dysfunction Detected by Video Head Impulse Test in Patients with Vestibular Migraine and Its Relationship with Symptomatic Improvement

Objectives: Video head impulse test (vHIT) can evaluate function of the vestibuloocular reflex for high frequency range rotation. We aimed to characterize abnormal patterns canal dysfunction by vHIT in vestibular migraine (VM) and relationship between presence symptomatic improvement.Methods: Eighty-seven patients with VM were included. Abnormality at initial examination was determined gain degrees corrective saccades each side. The improvement (no need preventive medication) after modification life styles medications 1, 3, 6 months evaluated.Results: Abnormal lateral 13.8% when criteria 31.0% based on both saccade, regardless superior posterior canals 18.4% 27.6%, any side observed 47%. Patients showed 29.9%, 71.3%, 88.5% months. results significantly related poor response mediations.Conclusions: Prolonged medication required abnormal, suggesting that peripheral abnormality is closely pathophysiology migraine.