[Visual evoked potentials in adults with migrainous vertigo].

OBJECTIVE

To investigate the visual evoked potentials in adults with migrainous vertigo (MV).

METHODS

Totally 113 patients with MV were enrolled from vertigo clinic. Patients received necessary laboratory examinations as well as pattern visual evoked potential (PVEP) testing.

RESULTS

Definite MV accounted for 46.9% (53/113) and probable MV accounted for 53.1% (60/113). Among 74 patients who received PVEP, the results were normal in 35 patients (47.3%) and abnormal in 39 patients (52.7%). The abnormal manifestations included lowered N75-P100 amplitude, elongated latency of P100, and lowered N75-P100 amplitude combined with delayed latency of P100. Seven patients with MV had unilateral lowered N75-P100 amplitude and 4 had bilateral abnormal amplitude. Nine patients had unilateral delayed latency of P100 and 11 had bilateral abnormal latency. Four patients had unilateral and 4 had bilateral abnormal N75-P100 amplitude and latency of P100.

CONCLUSIONS

MV patients usually have abnormal PVEP. PVEP may become a useful electrophysiological test in the diagnosis of MV.