FIG 2. Virtual slipstreams, shown at selected times in lateral (top row) and anteroposterior (bottom row) oblique views, provide an overview of the aneurysm hemodynamics.

A, Early systole (t = 50 ms). Slipstreams showed little mixing or spreading as they approached the neck.

B, Peak systole (t = 150 ms). Slipstreams spread and began to mix as they entered both the proximal and distal ends of the neck.

C, Early diastole (t = 300 ms). Slipstreams mixed as they impacted the posterior wall of the aneurysm and swirled in the right and inferior directions.

D, Late diastole (t = 800 ms). Within 0.5 second, the aneurysm was almost entirely opacified by vigorously mixed slipstreams.