主动脉夹层(AD),指主动脉内血液从主动脉内膜撕裂处进入主动脉中层,使中膜分离,并沿主动脉长轴方向扩展,形成主动脉壁的二层分离状态,又称主动脉夹层血肿[1]。这是一种危及生命的严重血管疾病,属高血压急症。其病情发展迅速,临床表现复杂多变,迄今有相当比例的病例因漏诊误诊而 Aortic dissection (AD) refers to the aorta blood from the aortic intimal tear into the middle of the aorta, the membrane separation, and along the long axis of the aortic expansion, the formation of aortic wall of the second separation, and Said aortic dissection hematoma [1]. This is a serious life-threatening vascular disease, which is an emergency of high blood pressure. Its rapid development of the disease, the clinical manifestations of complex and changeable, so far a considerable proportion of cases due to missed diagnosis and misdiagnosis