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探讨短暂性脑缺血发作(TIA)患者脑梗死的发生率及可能相关的因素.方法:对126例颈内动脉系统TIA的临床与CT资料进行分析.结果:脑CT扫描后发现72例显示梗死灶,占57.1％.其中:单发新鲜梗死灶38例,多发新鲜梗死灶18例,新旧梗死灶并存16例.以腔隙性梗死灶最为多见(97.5％),多数病灶与本次TIA症状无关,与本次TIA临床症状相对应的责任病灶仅占26.4％.局限性脑功能障碍持续的时间越长,发生脑梗死的机率就越大,症状持续时间超过30分钟和超过60分钟者发生脑梗死的相对危险度分别为不足或等于30分钟者的8.5和8.6倍,无梗死灶组症状持续时间绝大多数(89％)不足或等于30分钟.结论:传统的TIA概念是不确切的,其发作持续时间超过30分钟者诊断TIA应慎重.“,”Objective: To investigate the incidence of cerebral infarction and its related factors in patients withtransient ischemic attacks (TIA). Method: Clinical and CT data of 126 cases carotis interna artery system TIA wereanalysed. Results: Cerebral infarction was found by CT scan in 72 cases of 126 patients with TIA (57. 1% ). Amongthese 72 cases, 38 cases were found to have fresh mono-infarct focus, 18 cases with fresh multi-infarct sites, and 16cases with both. Lacuna infarctions were most frequently found (97. 5%) - Only 26. 4% of infarcted focus responsiblefor the TIA. The longer the duration of the local cerebral dysfunction persisted,the higher the incidence of cerebral infarction would be. The possibility of suffering from cerebral infarction in those who had symptoms lasted for morethan 30 minutes and 60 minutes was 8. 5 and 8.6 times respectively as that in patients who had symptoms for less than30 minutes. Most patients (89%) whose symptoms lasted for less than 30 minutes had no infarct focus. Conclusion:The traditional concept of TIA is probably inadequate, and diagnosis of TIA in patients with symptoms last for morethan 30 minutes should be made cautiously