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FIG 3. Arterial bifurcation with aneurysm bleb.
A, Instantaneous velocity vector plot of flow in arterial bifurcation model with aneurysm bleb during deceleration portion of systole.
B, Continuous particle paths for t* = 200–400 for arterial bifurcation model with aneurysm bleb. Initially the particles were aligned across the lumen of the parent artery proximal to the bifurcation.
C, Instantaneous pressure contours for arterial bifurcation model with aneurysm bleb during deceleration portion of cardiac systole (t* = 245). Plot corresponds to time of maximal pressure at bifurcation. For reference purposes, contour A corresponds to a value of -0.567 dpu (dimensionless pressure units) whereas contour J corresponds to a value of 1.757 dpu.
D, Line plot of instantaneous pressure along arterial wall corresponding to figure 3E. Location of maximal pressure corresponds to location of stagnation point at aneurysm neck site N1.
E, Pressure time history plot for asymmetrical arterial bifurcation model with aneurysm bleb over one cardiac cycle. Curve A corresponds to the vessel inlet, Curve B corresponds to the aneurysm neck site N1 and Curve C corresponds to the aneurysm neck site N2.
F, Time history plot of shear rates for asymmetric arterial bifurcation model with aneurysm bleb at aneurysm neck sites N1 and N2. Curve A and B correspond to aneurysm neck sites N1 and N2, respectively. Note that the shear rate values at N2 exceed those of N1 throughout the entire cardiac cycle.
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