Hemodynamic versus hydrodynamic effects of Guglielmi detachable coils on intra-aneurysmal pressure and flow at varying pulse rate and systemic pressure.

Background And Purpose: Alterations in intra-aneurysmal pressure and flow have been observed after treatment with Guglielmi detachable coils (GDCs). We wished to determine whether these changes could be assigned to a hydrodynamic effect of the coils themselves or a compound effect of coils plus thrombus formation.

Methods: Intra-aneurysmal pressure and flow were measured with a 0.

Intraarterially administered verapamil as adjunct therapy for cerebral vasospasm: safety and 2-year experience.

Background And Purpose: Despite the widespread use of angioplasty, adjunct chemical therapy is often needed to treat patients with cerebral vasospasm. In this study, we examined the safety of intraarterial administration of verapamil to patients with cerebral vasospasm. We herein summarize our 2-year experience with this treatment.

Combined time-resolved and high-spatial-resolution 3D MRA using an extended adaptive acquisition.

Purpose: To combine the benefits of time-resolved dynamic imaging and single elliptical centric acquisitions in a reasonable scan time.

Materials And Methods: A time series of images with moderate spatial resolution was acquired using the 3D Time-Resolved Imaging of Contrast KineticS (3D TRICKS) technique with elliptical centric encoding during contrast arrival. Following venous opacification, a complete large centrically encoded k-space volume was acquired.