Fig. 3. Blood flow of paired CFD virtual models before and after recurrence in case 3. (A) White arrow indicates a small vortex formation near the neck of completely occluded aneurysm at the origin of posterior communicating artery. (B) The blood flow entered the sac of recanalized aneurysms through the impingement region and it formed a large and complex vortex in the recanalized aneurysmal sac.
