The wall shear stress formed under the impact of blood flow is most prominent in the neck of aneurysms than other locations and is weak in the aneurismal wall.
切应力由于血流冲击瘤壁形成，主要存在于瘤颈处且方向可变化，瘤壁很微弱；
The wall of ruptured aneurysms was found to be fragile, possibly because macrophage infiltration into the aneurismal wall resulted in loss of smooth muscle cells and in degradation of matrix proteins.
破裂动脉瘤的瘤壁脆性增加，可能与平滑肌细胞缺失和基质蛋白降解而引起的炎性细胞浸润有关。
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