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Bilateral vestibulopathy (BV) is a rare, frequently idiopathic, disorder. This retrospective chart review involved 255 individuals with BV (mean age, 62; age range at onset, 12–98). Participants had undergone standardized evaluations in 1988–2005 at the authors’ dizziness clinic and had decreased vestibulo-ocular reflex during a head-thrust test or low caloric response on electronystagmography.
The mean delay between first symptoms and diagnosis was 65 months. Nearly all patients had gait unsteadiness, and 44% had oscillopsia (illusion that the world moves during head movements). Episodic vertigo with a stuttering course occurred in 35%; other patients had a slowly progressive course without vertigo, and 65% of these patients had idiopathic …