BACKGROUND AND PURPOSE Brain aneurysms and vascular malformations can cause cerebral hemorrhages, with devastating consequences for the patients and their families. Since the development of microcatheters and materials used for endovascular embolization, we have witnessed a rapid advancement in the technology and in the number or patients treated with this approach. The aim of this review is to...

BACKGROUND AND PURPOSE Paragangliomas are tumors of neural crest origin commonly arising from the carotid body, vagal nerve, or jugular bulb. The definitive treatment for these tumors is surgical resection, often augmented with pre-operative embolization due their highly vascular nature. We present our experience examining the efficacy and safety of endovascular embolization of these rare tumor...

OBJECTIVE Vascular malformations are uncommon pathologic entities in which surgery is usually not possible or is inefficient. Our experience with the percutaneous treatment of peripheral vascular malformations, by means of transarterial embolization or direct puncture is here reported. MATERIAL AND METHODS During the 1993-1997 period a total of 35 patient, 20 females (57%) and 15 males (43%) ...

BACKGROUND AND PURPOSE Wall shear stress (WSS) has been implicated as an important stimulus for vascular remodeling. The purpose of this study is to measure WSS in AVM arterial feeders using quantitative magnetic resonance angiography pre- and post-embolization/surgery. METHODS Records of patients who underwent AVM embolization and surgical resection at our institution between 2007 and 2013 a...

Transapical aortic valve replacement through an apical aneurysm is traditionally contraindicated because of the risk of severe systemic embolization when thrombi are present. However, a chronic fibrotic aneurysm without apical thrombi carries a low risk of distal embolization and can be safely employed for a transapical transcatheter aortic valve replacement in case of absence of an alternative...

We propose a device composed of catheter to deliver embolic agent as well pressure sensor monitor the extent occlusion. By continually measuring intravascular pressure, this allows for consistent, objective determination clinically relevant procedural endpoint; and prevention anterograde reflux off-target embolization. To assess functionality our prototype, we used vascular flow simulator, whic...

To explore mechanisms of hypoxemia after acute pulmonary embolism, we measured regional pulmonary blood flow and alveolar ventilation before and after embolization with 780-micrometers beads in five anesthetized, mechanically ventilated pigs. Regional ventilation and perfusion were determined in approximately 2.0-cm3 lung volumes by using 1-micrometers-diameter aerosolized and 15-micrometers-di...

Septic embolism associated with infective endocarditis (IE) is the occlusion of a blood vessel caused by an infected thrombus traveling through bloodstream resulting in ischemia and/or infarction. can result infarction due to vascular and infection, inflammation possible abscess formation. Systemic embolization generally occurs left-sided IE, causing stroke, blindness or endophthalmitis, spleni...

INTRODUCTION Percutaneous nephrolithotomy (PCNL) represents a safe and efficient procedure in the surgical management of renal lithiasis. Nevertheless, surgeons have to face specific complications during and after the procedure, hemorrhage being one of the most common. In most cases the injuries are self-limited and do not need a surgical intervention. Renal arteriography with selective angiogr...

A knowledge of the variations of renal vascular anatomy has importance in exploration and treatment of renal trauma, renal transplantation, renovascular hypertension, renal artery embolization, angioplasty or vascular reconstruction for congenital and acquired lesions, surgery for abdominal aortic aneurysm and conservative or radical renal surgery (Sampaio & Aragão,1990; Satyapal et al., 1999; ...