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目的探讨血管内皮生长因子(vasculax endothelial growth factor,VEGF)单核苷酸多态性(single—nucleotide polymorphisms,SNPs)与白发性蛛网膜下腔出血(subarachnoid hemorrhage,SAH)后脑血管痉挛(cerebral vasospasm,CVS)的相关性。方法经临床确诊SAH患者189例,采用TCD检测和评定SAH患者CVS情况,分为CVS(-)组96例和CVS(+)组93例,另选健康对照组120名,采用聚合酶链反应