title: Computational fluid dynamic analysis following recurrence of cerebral aneurysm after coil embolization.
abstract: Hemodynamic factors are thought to play important role in the initiation, growth, and rupture of cerebral aneurysms. However, hemodynamic features in the residual neck of incompletely occluded aneurysms and their influences on recanalization are rarely reported. This study characterized the hemodynamics of incompletely occluded aneurysms that had been confirmed to undergo recanalization during long-term follow-up using computational fluid dynamic analysis. A ruptured left basilar-SCA aneurysm was incompletely occluded and showed recanalization during 11 years follow-up period. We retrospectively characterized on three-dimensional MR angiography. After subtotal occlusion, the flow pattern, wall shear stress (WSS), and velocity at the remnant neck changed during long-term follow-up period. Specifically, high WSS region and high blood flow velocity were found near the neck. Interestingly, these area of the remnant neck coincided with the location of aneurysm recanalization. High WSS and blood flow velocity were consistently observed near the remnant neck of incompletely occluded aneurysm, prone to future recanalization. It will suggest that hemodynamic factors may play important roles in aneurismal recurrence after endovascular treatment.
authors.affiliation: Department of Neurosurgery, Fujita Health University, Toyoake city Aichi 470-1192, Japan.
authors.forename: Keiko
authors.initials: K
authors.lastname: Irie
authors.forename: Hitomi
authors.initials: H
authors.lastname: Anzai
authors.forename: Masahiko
authors.initials: M
authors.lastname: Kojima
authors.forename: Naomi
authors.initials: N
authors.lastname: Honjo
authors.forename: Makoto
authors.initials: M
authors.lastname: Ohta
authors.forename: Yuichi
authors.initials: Y
authors.lastname: Hirose
authors.forename: Makoto
authors.initials: M
authors.lastname: Negoro
keywords: Cerebral aneurysm; endovascular treatment; hemodynamics recanalization; wall shear stress