主动脉夹层是一种不常见但具有潜在灾难性的疾病〔1〕。主动脉夹层形成是由于动脉内膜撕裂,血液进入动脉壁内造成内膜与中膜分离,并沿着主动脉长轴方向扩展形成真假二个通道。如未能早期诊断及时治疗,病死率极高,预后极差。1/4以上患者在发病24h内死亡,半数以上于1周内死亡,3/4 Aortic dissection is an uncommon but potentially catastrophic disease [1]. The formation of aortic dissection is due to intima tear, the blood into the artery wall caused by separation of the intima and media, and along the long axis of the aortic expansion to form true and false two channels. If failed to early diagnosis and timely treatment, mortality is extremely high, the prognosis is poor. More than a quarter of patients died within 24 hours of onset, more than half died within 1 week, 3/4