Fig. 4

Distributions of pressures (a), WSSs (b) and OSIs (c) at peak systole for model A (upper) and model B (lower). Red and black arrows point to the recirculating zones at the blebs and the stagnation regions, respectively. There obviously exists a featured distribution of high OSIs and low WSSs at the blebs, with high pressures and WSS gradients in the two ruptured aneurysms A2 and B2