抄録
One hundred and twenty-two cases of benign paroxysmal positional vertigo (BPPV) were studied with respect to the duration of vertigo and nystagmus and posibilities of recurrence of vertigo.
Vertigo and nystagmus disappeared from 2 days to 10 months after the attack. In 93% of BPPV, vertigo and nystagmus disappeared in 3 months.
Vertiginous attacks appeared 2 to 6 times in 11 cases (two times in 9 cases, three times in one case and six times in one case). The lesion was on the same side as the first attack in 10 cases, although it was on the other side in one case. Vertigo occurred a second time 1-3 months after the first attack in 4 cases, 3-6 months in 3 cases, one year in 3 cases and 5 years after in one case. In 8 cases, unilateral caloric responses were reduced. This seems to suggest that if unilateral caloric responses remain reduced, there is a posibility of recurrence of vertigo.
