نتایج جستجو برای: avr
تعداد نتایج: 2454 فیلتر نتایج به سال:
BACKGROUND To evaluate the perioperative risk of redo aortic valve replacement (AVR). MATERIALS AND METHODS Sixty-three patients (53 males, 10 females) underwent redo AVR from 2001-2005. Forty-one bioprostheses had to be replaced for degeneration and/or paravalvular leakage, and 18 mechanical prostheses were changed because of thrombosis and/or paravalvular leakage. Four patients with a bicus...
OBJECTIVE The Hancock II (HII) is a second-generation porcine bioprosthesis introduced into clinical use in 1982. This study aimed to evaluate very long-term outcomes for the HII valve in a large patient population. METHODS Between May 1983 and November 1993, 517 consecutive patients (pts) (309 male, mean age: 64+/-9 years) underwent valve replacement (VR) surgery with HII, with 302 (58.4%) i...
Numerous indirect methods for apical vertebral rotation (AVR) measurement have been reported and none of them seems to be as accurate as computed tomography evaluation. The aim of this study was to compare spinal rotation changes during innovative technique of intraoperative computed tomography (ICT) evaluation with indirect methods such as Perdriolle and clinical evaluation with scoliometer. W...
BACKGROUND Mitral regurgitation (MR) is common in those with severe aortic regurgitation (AR) and can predispose to atrial fibrillation, heart failure, and a need for mitral valve surgery during aortic valve replacement (AVR). However, little data exist as to its clinical and prognostic implications. METHODS AND RESULTS Search of our echocardiographic data base between 1993 and 2007 yielded 7...
We retrospectively studied 252 operated and 47 unoperated patients with isolated aortic valve disease. Aortic valve replacement (AVR) was recommended to all patients based on clinical and hemodynamic data. Preoperative hemodynamic and angiographic data were similar in operated and unoperated cohorts. Seventy-one percent of patients received a Bjork-Shiley prosthesis. Operative mortality was 7% ...
For patients with hemodynamically severe aortic regurgitation (AR), the primary remedial therapy is surgical aortic valve replacement (AVR). Timing of surgery, however, is a moving target. Techniques and prosthetic devices continually improve, justifying AVR progressively earlier in the natural history of the disease. Indeed, there is currently a general consensus that surgery for AR is appropr...
BACKGROUND Xenografts ultimately fail as a result of acute vascular rejection (AVR), a process characterized by intravascular thrombosis, fibrin deposition, and endothelial cell activation. METHODS AND RESULTS We studied whether targeted deletion of Fgl-2, an inducible endothelial cell procoagulant, (Fgl-2-/-) in the donor prevents AVR in a mouse-to-rat cardiac xenotransplantation model. By 3...
BACKGROUND The European System for Cardiac Operative Risk Evaluation (EuroSCORE) is a widely used risk assessment tool in patients with severe aortic stenosis to determine operability and to select patients for alternative therapies such as transcatheter aortic valve implantation. The objective of this study was to determine the accuracy of the EuroSCORE in predicting mortality following aortic...
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