中文摘要：

目的分析后循环缺血（PCI）的危险因素及受累血管情况,为防治PCI提供依据。方法对急性后循环脑梗死及短暂性脑缺血发作（TIA）患者（各80例）的临床资料作回顾性分析。结果 PCI最常见的危险因素分别为高血压、糖尿病、高脂血症、吸烟等;PCI血管病变中高达90.4%为动脉粥样硬化斑块、血管狭窄或闭塞;后循环TIA组前循环血管病变比例为28.21%,脑梗死组前循环血管病变比例为25%。结论 PCI最常见的危险因素分别为高血压、糖尿病、高脂血症、吸烟等,以前后循环血管同时受累为主。

英文摘要：

Objective To analyze the risk factors and involved vessels of posterior circulation ischemia（PCI）,so to provide basis to the prevention and treatment of PCI.Methods The clinical data of 80 patients with posterior ischemic stroke and 80 patients with transient ischemic attack（TIA）were retrospectively analyzed.Results The most common risk factors for PCI were hypertension,diabetes,hyperlipid-emia,smoking and so on;The incidence of atheroma plaque,vessel stenosis or occlusion was 90.4% PCI vascular abnormalities;The proportion of anterior circulation vascular abnormalities in patients with posterior TIA was 28.21%,and 25% in patients with posterior ischemic stroke.Conclusions The most common risk factors for PCI include hypertension,diabetes,hyperlipidemia,smoking and so on,of which the anterior circulation and posterior circulation are involved simultaneously.