蛛网膜下腔出血是一相当常见的疾病,发病率在大量居民中,约每年每十万人中为5—20人,以荷兰为例每十万人中近于10人。据协作性研究报告,6,368例蛛网膜下腔出血之病因,囊型动脉瘤为51%,动静脉异常为6%,其余为不同疾病所致或原因不明,阿姆斯特丹某医院的本病死亡病例尸解时,均发现一个或多个的动脉瘤。近年脑血管造影表明动脉瘤的发病率在增加,1969年达高峰,即 Subarachnoid hemorrhage is a fairly common disease with a high prevalence of 5-20 inhabitants per 100,000 inhabitants a year, and nearly 10 in 100,000 in the Netherlands, for example. According to a collaborative study, the cause of 6,368 cases of subarachnoid hemorrhage was 51% of saccular aneurysms, 6% of arteriovenous anomalies, and the remainder were caused by different illnesses or were of unknown cause. The death of this disease in a hospital in Amsterdam One or more aneurysms were found during solution. Cerebral angiography in recent years shows that the incidence of aneurysms is on the rise, reaching a peak in 1969, that is