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颈内动脉狭窄或闭塞侧支循环途径及其与临床关系的研究进展 被引量:9

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摘要 颈内动脉狭窄或闭塞的临床表现有很大的可变性,主要是由于侧支循环的差异性所致。主要的侧支循环途径是Wills环的前交通动脉和后交通动脉,次级的侧支循环途径有眼动脉和软脑膜吻合支,脑底异常血管网为Movamova病的一种特殊的侧支循环途径,而脉络膜前动脉是一种少见的侧支途径,多在基底动脉和大脑后动脉有狭窄时出现,穿硬膜支为脑底动脉环严重闭塞后由颈外动脉分支提供侧支血流的一种途径。颈内动脉狭窄或闭塞时如果侧支循环丰富,可为缺血的脑组织提供保护作用,缺乏侧支循环可出现大面积脑梗塞。因此,了解颈内动脉狭窄或闭塞患者的侧支循环建立情况,可为临床治疗及预后判断提供可靠依据。
作者 赵云辉
出处 《影像诊断与介入放射学》 2001年第4期250-252,共3页 Diagnostic Imaging & Interventional Radiology
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