Five Patients with Recurrent Vertigenous Attacks Subsequent to Profound Sudden Hearing Loss

Abstract

Five patients with long term recurrent vertigenous attacks subsequent to profound sudden hearing loss were observed neurotologically and the related pathology was investigated.Characteristic findings were as follows;1) subjective; positional vertigo2) objective; direction changing positional nystagmus and marked canal paresis in the bithermal caloric test3) no fluctuating tinnitus or hearing loss; the cerebellopontine angle cystic arachnitis and broad vascular disorder including those in the central nervous system were assumed to be the etiology. Concerning the arachnitis, physiomechanical, inflammatory, and/or a hydrodynamic influence on the labyrinth via the perilymphatic system were seemed likely to occur.