暂时性脑缺血发作(TIA)是脑血管疾病常见的症状。临床特征为突然发生的局灶性神经损害,持续达24小时,而不留后遗体征。通常在3年之内,约30％病例经1次或多次TIA后发生完全性脑卒中,但是发生在椎—基底动脉内的发作,预后是相当好的。大部分TIA是由于栓子经过脑血管循环引起。罕有继发于突然失血、低血压或心脏排血量下降使狭 Temporary ischemic attacks (TIA) are common symptoms of cerebrovascular disease. The clinical features were sudden focal neurological damage lasting up to 24 hours without leaving a post-mortem sign. Often, within 3 years, complete stroke occurs in about 30% of cases after one or more TIA episodes, but occurs within the vertebrobasilar artery and the prognosis is quite good. Most TIA is due to emboli through the cerebrovascular cycle caused. Rare secondary to sudden loss of blood pressure, hypotension or decreased cardiac output so narrow