Wall shear stress accompanied with initial, progressive, and developed aneurysm induced around anterior communicating artery

In the present paper, the distribution of the wall shear stress around the apex of the anterior communicating artery with the initial, progressive, and developed aneurysms has been studied in laminar steady flow. The anterior communicating artery composing of the circle of Willis is one of the predilection sites where the cerebral aneurysm is prone to appear frequently. Once the small aneurysm initiates at the apex in one confluent tube with much flow rate, the distribution of the wall shear stress abruptly changes around the initial aneurysm. Accompanying with the progress of the aneurysm, the wall shear stress distinctly changes along the concaved surface of the aneurysm. The effect of the wall shear stress change on the progress of the aneurysm is physiologically examined from the viewpoint of hemodynamics.