CT血管成像显示分水岭脑梗死患者Willis环的特征

Willis circle in cerebral watershed infarction:a study based on CT angiography

目的探索Willis环在分水岭脑梗死发生过程中的独特代偿作用。方法应用CT血管成像(CT angiography,CTA)技术,回顾性分析2011年6月至2013年12月于我院住院治疗的471例急性非分水岭脑梗死和93例分水岭脑梗死(包括外侧型及内侧型两型)患者的颅内动脉,比较各组患者Willis环相关动脉的变异情况及构型特点。结果与非分水岭脑梗死相比,外侧型分水岭脑梗死患者中单侧胚胎型大脑后动脉明显增多(36.4%,P<0.05),而内侧型分水岭脑梗死患者双侧胚胎型大脑后动脉明显减少(0%,P<0.05),Willis环其余相关动脉变异及构型组成未见明显统计学差异(P>0.05)。结论与非分水岭脑梗死相比,胚胎型大脑后动脉与分水岭脑梗死有着独特关系。

ObjectiveTo explore the unique relationship between Willis circle and cerebral watershed infarction in a Chinese population.MethodsA retrospective analysis of cerebral CT angiography was conducted in 471 non-cerebral watershed infarctions and 93 MRI-diagnosed cerebral watershed infarctions（CWI）（including External CWI and Internal CWI）in Department of Neurology of our hospital and compare the related variations and types of Willis circle between these groups.ResultsCompared with non-cerebral watershed infarctions, the prevalence of Uni-FTP（short for＂fetal type of the Posterior cerebral artery＂） in E-CWI（36.4%, P0.05） and Bi-FTP in I-CWI（0%, P0.05） was significantly higher in cerebral watershed infarctions.ConclusionFTP is probably an unique risk factor in Chinese patients with CWI.