Department of Neurology, The First Affiliated Hospital, Chongqing Medical University, Chongqing 400016, China.
J Clin Neurosci. 2011 Mar;18(3):379-83. doi: 10.1016/j.jocn.2010.07.137. Epub 2011 Jan 19.
The circle of Willis is a major collateral circulation that has an important role in ischemic events. The purpose of our study was to investigate the collateral circulation in a Chinese population with 64-section multidetector CT angiography (CTA). A total of 170 patients who underwent 64-section CT angiography at The First Affiliated Hospital of Chongqing Medical University were included in our study. The morphological variations in the anterior and posterior circle of Willis were assessed in each patient. A total of 160 patients were included in the final analysis, of whom 126 (79%) demonstrated a complete anterior circle of Willis, and 50 (31%) had a complete posterior circle of Willis. A complete circle of Willis was seen in 43 of 160 participants (27%). A fetal-type posterior circle of Willis was seen in 15 (9.4%) patients. This is the first report of a CTA study of collateral circulation in a Chinese population. A higher prevalence of compromised posterior collaterals was observed in this Chinese population compared to Western and Japanese populations.
Willis 环是一个主要的侧支循环系统，在缺血性事件中具有重要作用。我们的研究目的是使用 64 层多层螺旋 CT 血管造影（CTA）来研究中国人的侧支循环。共有 170 名在重庆医科大学第一附属医院接受 64 层 CT 血管造影的患者纳入了我们的研究。在每位患者中评估了前、后 Willis 环的形态学变异。最终有 160 名患者纳入了最终分析，其中 126 名（79%）存在完整的前 Willis 环，50 名（31%）存在完整的后 Willis 环。在 160 名参与者中，有 43 名（27%）存在完整的 Willis 环。15 名（9.4%）患者存在胎儿型后 Willis 环。这是首次对中国人侧支循环进行 CTA 研究的报道。与西方和日本人群相比，中国人的后向侧支循环代偿功能受损更为常见。
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