Gaze-evoked nystagmus (GEN) per video-oculography (VOG) was pathological with a Bruns’ pattern in 33% of patients admitted to the emergency department with acute vestibular syndrome (AVS).
Why this matters ?
GEN can either be a pathological central sign of acute dizziness, or a normal physiological occurrence. Distinguishing between pathological versus physiological GEN is complex, particularly in patients with AVS.
Characterization of GEN in the acute phase of AVS in the light is warranted, and could help to support the diagnosis of strokes in patients with AVS using the HINTS (nystagmus, head impulse, skew) test.