めまい症例に対する神経血管減圧術の術後評価

抄録

Three patients treated with microvascular decompression to relieve severe disabling rotatory vertigo were followed for two years. All patients had relief of symptoms. The results show that microvascular decompression is an effective way to treat disabling severe vertigo, but two of them complained of occasional brief episodes of floating sensation.
Vestibular function tests of these two patients showed biphasic head-shaking nystagmus in one patient and paralytic nystagmus in the other. Caloric responses were not abnormal. Possible neural mechanisms related to neurovascular compression of the eighth cranial nerve are discussed with special reference to vestibular symptoms.