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分水岭梗塞是两条主要动脉供血之间的区域缺血性病变。一般认为是由于大脑血栓性脉管炎、全身低血压发作、颈内动脉闭塞和微栓塞所致。两侧分水岭梗塞与严重的低血压有关;单侧分水岭梗塞见于闭塞性脑血管病伴全身低血压发作而导致局限性大脑灌注降低。以前认为血液动力学障碍是分水岭梗塞的主要原因。作者报道3例栓子性分水岭梗塞,并且指出血液动力学障碍并非是分水岭梗塞的唯一原因。
Watershed infarction is a regional ischemic disease between two major arterial donors. Is generally believed that due to cerebral thrombotic vasculitis, systemic hypotension, carotid artery occlusion and micro-embolism caused. Watershed infarcts on both sides are associated with severe hypotension; unilateral watershed infarction is seen in patients with occlusive cerebrovascular disease with systemic hypotension that leads to localized cerebral perfusion reduction. Hemodynamic disorders were previously considered to be the main cause of watershed infarction. The authors report three cases of embolic watershed infarction and point out that hemodynamic disorders are not the only cause of watershed infarction.