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根据近几年来文献的介绍,缺血性脑血管病的发病率远远多于出血性。据统计脑梗塞约占卒中的85％左右,余为颅内出血(15％)。由于动脉硬化引起的脑梗塞(ABI)占卒中的55～57％,心源性梗塞占12～15％。故引起脑梗塞的主要原因是脑动脉硬化。脑动脉硬化一般多发生于50～60岁以上老年人。但自1961年以来,不少作者注意到40岁以上,主要由于颅外段颈动脉、椎动脉及锁骨下动脉粥样硬化所引
According to the literature in recent years, the incidence of ischemic cerebrovascular disease far more than hemorrhagic. According to statistics, cerebral infarction accounted for about 85% of the stroke, the remaining intracranial hemorrhage (15%). Cerebral infarction (ABI) due to atherosclerosis accounts for 55- 57% of strokes and cardiogenic infarcts comprise 12-15%. Therefore, the main cause of cerebral infarction is cerebral arteriosclerosis. Cerebral arteriosclerosis generally occurs in the elderly over the age of 50 to 60 years. However, since 1961, many authors have noticed over 40 years of age, mainly due to the extracranial carotid artery, vertebral artery and subclavian atherosclerosis