Conclusion The geometrical morphology and microstructure alter unequally in axial and circumferential directions of the aortic arch,which reflects the inequality of the vascular stress and strain.

• 结论人主动脉弓几何形态与显微结构存在血管轴向和周向非均匀性，提示主动脉弓应力应变的不均匀状况。