动脉瘤的发生、发展过程十分复杂;不仅涉及动脉壁的损害,还与血流动力学因素的改变有关。血流的剪切应力对动脉瘤的发生、发展具有直接的作用,且该剪切应力随心动周期而改变。此外,动脉分叉角度也与动脉瘤的形成密切相关,不适当的动脉成角可以明显增加动脉瘤的发生概率,且动脉瘤在治疗过程中也会出现血流动力学因素的变化。 Aneurysms, the development process is very complicated; not only relates to the damage of the arterial wall, but also with changes in hemodynamic factors. The shear stress of blood flow has a direct effect on the occurrence and development of aneurysm, and the shear stress changes with the cardiac cycle. In addition, the angle of arterial bifurcation is also closely related to the formation of aneurysm. Improper angulation of the artery can significantly increase the aneurysm occurrence probability, and the aneurysm may also change the hemodynamic factors during the treatment.