aneurysms has become an accepted treatment option worldwide (1). However, principal disadvantage of embolization of aneurysms with detachable coils is that embolization could be limited by unfavorable shape of the aneurysms (2-5). Coils packed into the lumen of the wide-neck aneurysms have the inherent difficulty that coils can herniate into the parent vessels. The wide-neck of aneurysms also u...

ANGIORAD, Interventional Radiology, Hospital Santa Joana, Recife PE, Brazil: Interventional Radiologist, Scientific Director of ANGIORAD; Neurosurgeon, Hospital da Restauração, Recife PE, Brazil; Chaiman of the Department of Neurosurgery, Hospital da Restauração, Recife PE, Brazil; Resident of Neurosurgery, Hospital da Restauração, Recife PE, Brazil; Resident of Interventional Radiology, ANGIOR...

Finding intracranial aneurysms plays a key role in preventing serious cerebral diseases such as subarachnoid hemorrhage. For detection of aneurysms, magnetic resonance angiography (MRA) can provide detailed images of arteries non-invasively. However, because over 100MRA images per subject are required to cover the entire cerebrum, image diagnosis using MRA is very time-consuming and labor-inten...

BACKGROUND AND PURPOSE The canine vein pouch aneurysm model is widely used for testing and development of devices directed at the endovascular treatment of aneurysms. Our purpose was to determine the incidence of spontaneous thrombosis and rupture of these aneurysms. MATERIALS AND METHODS A retrospective review of laboratory records of canine vein pouch aneurysms made during a 6-year period w...

BACKGROUND AND PURPOSE FDs are the latest, most promising tool to treat giant and complex aneurysms. Currently available experimental aneurysm models do not reproduce the potential clinical difficulties of treating these lesions with FDs. MATERIALS AND METHODS Six large or giant canine fusiform aneurysms were created on the distal carotid arteries of 4 animals. Four of the aneurysms had multi...

Treatment for cerebral aneurysms is performed because aneurysm poses a risk of future neurologic deficits due to intracranial hemorrhage. Such surgical and endovascular treatment are prophylactic prevent harm patients. Ironically, these procedures themselves pose similar risks. During aneurysms, intraoperative neurophysiologic monitoring (IONM) can be used assess the functional state brain. Thr...

BACKGROUND AND PURPOSE The pathogenesis of aneurysms associated with cerebral arteriovenous malformation (AVM) feeder vessels is poorly understood. We sought to determine the hemodynamic characteristics of AVM feeder vessels with and without aneurysms. METHODS Patients with AVMs associated with feeder aneurysms who had flow, vessel diameter, and wall shear stress measured before treatment usi...

to weakness of all vessel wall layers. Most cerebral aneurysms probably result from hemodynamicallyinduced degenerative vascular injuries by abnormal hemodynamic shear stresses on the walls of large cerebral arteries, particularly at bifurcation points. It has been reported that 90% of all intracranial aneurysms arise from the anterior circulation (1, 2). Most aneurysms are asymptomatic until t...

BACKGROUND AND PURPOSE Mechanisms of both healing and complications, including spontaneous aneurysm rupture, remain unclear following flow diverter treatment. The aim of this study was to compare gene expression of various key molecules involved in the healing of aneurysms, between aneurysms treated with microcoils and flow diverters. METHODS Saccular aneurysms were created in rabbits. Aneury...

BACKGROUND AND PURPOSE Dissecting vertebrobasilar aneurysms are challenging to treat, and standard treatment modalities remain controversial. We retrospectively evaluated our experience using endovascular techniques to treat these aneurysms. MATERIALS AND METHODS From February 1997 to December 2007, 42 patients with intradural vertebrobasilar dissecting aneurysms underwent endovascular treatm...