主动脉夹层动脉瘤是血液渗入主动脉中层形成夹层血肿并沿主动脉壁延伸解离的严重心血管急症。以往认为该病罕见且临床表现复杂,因此其诊断和治疗不为一般临床医师重视和熟悉。随着主动脉造影、超声和CT 检查的应用和进展,发现本病并不十分罕见。据国外文献报道,其发生率约为5～10人/百万人口/年,与国人种属相近的日本,在尸检病例中,本病约 Aortic dissection aneurysm is the blood into the middle of the aorta to form dissection and dissection along the aortic wall dissection of severe cardiovascular emergency. In the past that the disease is rare and the clinical manifestations of complex, so its diagnosis and treatment are not for the average clinician attention and familiar. With aortography, ultrasound and CT examination of the application and progress, found that the disease is not very rare. According to foreign literature, the incidence of about 5 ~ 10 people / million population / year, and people of similar species of Japan, in autopsy cases, the disease about