短暂性脑缺血发作持续时间与预后的关系

Relationship between Duration of Transient Ischemic Attacks and Prognosis:36 Case Report

目的 探讨短暂性脑缺血发作（TIA）持续时间和影像学特征与临床预后的关系。方法 回顾性分析36例TIA患者的临床资料，分为TIA持续时间≤1h组（13例）和1～24h组（23例），分析头颅核磁共振弥散加权成像（MRI-DWI）显影率特点，对两组患者1年后进行随访，分析脑梗死发生率与持续时间和影像学特征的关系。结果 结果TIA持续时间≤1h组2例头颅MRI-DWI异常，持续时间1～24h组17例头颅MRI-DWI异常（χ^2=11．416，P=0．001）。1年后随访结果；持续时间≤1h组1例发生脑梗死，持续时间1～24h组14例发生脑梗死（χ^2=9．663，P=0．004）。结论 TIA持续时间长，头颅MRI—DWI异常率高，其临床预后结果差。

Objective To explore the relationship between the duration, MR1 characters and prognosis in transient ischemic attack （TIA）. Methods 36 TIA cases were retrospectively analyzed according to the duration and Magnetic Resonance Imaging Diffusion Weighted Imaging（MRI-DWI）. They were divided into two groups, Group A （13 cases） in which TIA continued within 1 h and Group B （23eases） in which TIA continued for 1-24 h. The patients were followed up 3 months and 12 months later. Results MRI abnormalities could be found with MRI-DWI in 2 cases in Group A, but 17 cases in group B（χ^2=11.416,P=0.001）. 1 case in Group A and 14 cases in Group B occured cerebral infarction within a year（χ^2 = 9. 663,P=0. 004）. Conclusion The longer TIA duration, the worse theprognosis.