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主动脉夹层动脉瘤,是主动脉内循环着的血流注入主动脉壁,冲开其中层形成的夹层血肿。其发病机制主要是:主动脉壁中层变性、坏死使动脉壁各层间粘着性降低,心脏搏动引起的主动脉重复运动,使升主动脉和降主动脉交界处遭受屈曲应力;血流的液体动力作用对主动脉壁的冲击力,在近端主动脉最为强烈;所有这些因素相结合,导致动脉内膜破裂,造成主动脉中层为夹层血肿剥离,血流的液体动力作用(主要与血压、流
Aortic dissection aneurysm, the aorta circulating blood flow into the aortic wall, open the middle of the formation of dissection hematoma. Its pathogenesis is mainly: the middle of the aortic wall degeneration, necrosis of the arterial wall adhesion between the lower heart aortic pulse-induced repetitive movements of the ascending aorta and descending aorta junction suffered buckling stress; blood flow of liquid The force of the impact on the aortic wall, the most intense in the proximal aorta; all these factors combine to cause rupture of the intima of the aorta, resulting in the dissection of the middle of the aortic dissection, blood flow of the liquid dynamic (mainly with blood pressure, flow