نتایج جستجو برای: heart valve
تعداد نتایج: 458904 فیلتر نتایج به سال:
BACKGROUND AND AIM OF THE STUDY In-vitro studies on the ATS heart valve have indicated that valve opening is less in an expanding conduit than in a straight conduit. METHODS Bileaflet valve behavior was studied using a new computational fluid-structure interaction model. A three-dimensional model of the ATS valve was studied in two geometries, simulating the valve in a geometry with sudden ex...
Congenital heart valve cyst is a rare and asymptomatic condition mostly seen in the mitral and tricuspid valves (1). In some cases, surgery is required as these cysts may cause obstruction, valve dysfunction, and sometimes embolism (2, 3). We think that if a heart valve cyst is asymptomatic and does not alter valve function, periodic evaluation with echocardiography is a feasible option. Here w...
To facilitate the radiographic identification of prosthetic heart valves, radiographic silhouettes of various aortic, mitral and tricuspid valve prostheses were analyzed and shematized. Forty different prosthetic valve models (heterograft and mechanical) were obtained from seven domestic manufacturers. Each prosthesis was positioned to approximate the aortic, mitral or tricuspid valve anulus pl...
OBJECTIVES This analysis reports on the initial German multicenter experience with the JenaValve (JenaValve Technology GmbH, Munich, Germany) transcatheter heart valve for the treatment of pure aortic regurgitation. BACKGROUND Experience with transcatheter aortic valve implantation (TAVI) for severe aortic regurgitation is limited due to the risk of insufficient anchoring of the valve stent w...
Introduction: The mitral valve prolapse is a heart syndrome that is characterized by considerable physical and psychological consequences for affected patients. This study aimed to assess the efficacy of cognitive-behavioral therapy in reducing worrying, generalized anxiety and panic attacks in patients with mitral valve prolapse. Methods: This study is quasi-experimental research with prete...
The valvular disease usually involves two conditions: valvular stenosis and valvular insufficiency. Valvular stenosis occurs when a valve opening is smaller than normal due to stiff or fused leaflets. The narrowed opening may make the heart work very hard to pump blood through it. This can lead to heart failure. All four valves can be stenotic (hardened, restricting blood flow); the conditions ...
f all valve lesions, mitral stenosis has the most options for ntervention and in many ways is the valve lesion where it is asiest to make a decision that intervention is necessary. his was the first acquired valve lesion where patient ymptoms and ultimate prognosis could be improved surgially even before cardiopulmonary bypass was available. The ndications for the timing of valve repair or repl...
BACKGROUND The majority of prosthetic heart valves currently implanted are tissue valves that can be expected to degenerate with time and eventually fail. Repeat cardiac surgery to replace these valves is associated with significant morbidity and mortality. Transcatheter heart valve implantation within a failed bioprosthesis, a "valve-in-valve" procedure, may offer a less invasive alternative. ...
BACKGROUND Functional tricuspid regurgitation (TR) occurs in patients with rheumatic mitral valve disease even after mitral valve surgery. The aim of this study was to analyze surgical results of TR after previous successful mitral valve surgery. METHODS From September 1996 to September 2008, 45 patients with TR after previous mitral valve replacement underwent second operation for TR. In tho...
One hundred patients who underwent heart valve replacement during the years 1977 to 1985 were reviewed an average of 57 months after surgery. The overall rate of reemployment after the operation was 78%. The most important factors influencing the return to work were the employment status before surgery, age at the time of surgery, the number and site of the diseased valve, the preoperative New ...
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