脑梗塞高信号血管征与脑血管狭窄及Willis环完整性的相关研究

发布时间：2018-01-17 20:29

  本文关键词：脑梗塞高信号血管征与脑血管狭窄及Willis环完整性的相关研究　出处：《中国临床医学影像杂志》2016年03期 　论文类型：期刊论文

  更多相关文章： 脑梗塞 磁共振成像

【摘要】：目的:探讨磁共振FLAIR高信号血管征(HVS)在大脑中动脉供血区脑梗塞患者中的发生特点。方法 :回顾性分析急性大脑中动脉供血区脑梗塞患者的影像学资料,按出现症状到行MRI检查时间的不同分为3组,分析总体HVS发生率及各组发生率,比较组间HVS的发生率差异。采用χ~2检验分析HVS的发生部位、分布范围及级别与颅底血管狭窄情况及脑梗塞形态的相关性、统计分析不同Willis环类型患者发生HVS的差异。结果:HVS阳性率在≤24 h组为81.82%,2~4 d组为69.35%,5~7 d组为63.41%,HVS总体发生率随时间延长呈下降趋势,然各组间无明显统计学差异。HVS发生随血管狭窄程度增加而增高(P=0.000)。同时,M1段出现HVS时趋向为大片脑梗塞,而M4~5段出现HVS时趋向为散在脑梗塞。Willis环后循环不完整组较完整组出现HVS阳性率显著增高(χ~2=7.089,P=0.008)。结论 :1HVS在急性大脑中动脉区脑梗塞早期具有较高阳性率,随着时间延长而降低。2脑血管狭窄程度越严重其HVS分布越广泛且级别越高。3M1段出现HVS趋向为大面积脑梗塞,M4~5段HVS趋向为散在小片脑梗塞。4Willis环缺损是脑梗塞形成的一个重要影响因素。Willis环后循环缺损患者HVS发生率显著高于后循环完整者。
[Abstract]:Objective: to study the hyperintense vascular sign of magnetic resonance (FLAIR). The characteristics of cerebral infarction in the middle cerebral artery (MCAA) region. Methods: the imaging data of the patients with acute cerebral infarction in the MCAA region were analyzed retrospectively. The patients were divided into 3 groups according to the time from symptom onset to MRI examination. The overall incidence of HVS and the incidence of each group were analyzed. The incidence of HVS was compared between the two groups. 蠂 ~ 2 test was used to analyze the correlation between the location, distribution and grade of HVS and the stenosis of skull base vessels and the morphology of cerebral infarction. Results the positive rate of HVS in 鈮，

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