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后循环缺血性卒中占卒中的25%~40%,70%的后循环缺血性卒中是动脉-动脉栓塞所致。由于血流动力学紊乱等原因,椎动脉起始部(vertebral artery origin,VAO)是最容易形成动脉粥样硬化的部位,因而成为了后循环缺血最重要的原因[1]。研究表明,9%~33%的后循环缺血性的患者有椎动脉起始部狭窄(vertebral artery origin stenosis,VAOS)或闭塞[2-3]。据新英格兰后循环缺血登记的年发病率测算,美国
Posterior circulation ischemic stroke accounts for 25% to 40% of the stroke, and 70% of the posterior circulation ischemic stroke is caused by arterial-arterial embolization. Due to hemodynamic disorders and other reasons, the vertebral artery origin (vertebral artery origin, VAO) is the most likely site of atherosclerosis, which became the most important cause of posterior circulation ischemia [1]. Studies have shown that 9% to 33% of patients with posterior circulation ischemia have vertebral artery origin stenosis (VAOS) or occlusion [2-3]. According to the annual incidence of ischemic registration of posterior circulation in New England, the United States