主动脉夹层(AD)是各种病因造成主动脉壁中层病变,当内膜破裂,血液在主动脉压力的作用下,从主动脉内膜撕裂处进入主动脉中层,形成夹层血肿并沿主动脉壁延伸剥离的严重心血管急症;其发病急骤,病情进展迅速,病情复杂,如不治疗,发病后最初48h内,病死率高达每小时1%～2%[1]。我院急 Aortic dissection (AD) is caused by various causes of the middle aortic wall lesions, when the rupture of the intima, the blood pressure in the aorta, from the aortic intima tear into the middle of the aorta, the formation of dissection and along the main hematoma Arterial wall extension and stripping of a serious cardiovascular emergency; its incidence is abrupt, rapid progression, the condition is complex, if not treated, the first 48h after onset, the mortality rate of up to 1% to 2% per hour [1]. Our hospital emergency