نتایج جستجو برای: heart valve prostheses
تعداد نتایج: 468816 فیلتر نتایج به سال:
This report deals with a rare complication of disc-valve prosthesis in the mitral area. A significant disc poppet and struts destruction of mitral BeaU valve prostheses occurred 20 and 17 months after implantation. The resulting valve incompetence in the first case contributed to the death of the patient. The durability of Teflon prosthetic valves appears to be in question and this type of valv...
The role of valve replacement in the treatment of Ebstein's anomaly of the tricuspid valve remains controversial. Since 1965, eight patients with Ebstein's anomaly ranging in age from seven to 22 years of age (mean 13 years) have undergone tricuspid valve replacement (TVR) in our institution. Seven were in functional class 3 or 4 (NYHA), while one was in class 2, but had an increase in cardiac ...
The in vivo evaluation of prosthetic device performance is often difficult, if not impossible. In particular, in order to deal with potential problems such as thrombosis, haemolysis, etc., which could arise when a patient undergoes heart valve replacement, a thorough understanding of the blood flow dynamics inside the devices interacting with natural or composite tissues is required. Numerical ...
BACKGROUND The Early Self Controlled Anticoagulation Trial (ESCAT I) showed that anticoagulation self-management after mechanical heart valve replacement decreased complication rates by maintaining INR levels closer to the target range than International Normalized Ratio (INR) home doctor management. The therapeutic range for the INR in that study was between 2.5 and 4.5 for all positions of pr...
The operative treatment of valve stenosis has now been shown, as a result of large numbers of successful operations, to be very satisfactory. The operative treatment of valve incompetence is, however, quite another matter; in spite of various ingenious efforts no satisfactory method has yet been introduced. My own experience is that the mortality of these procedures is high and the results bad;...
The study was aimed at assessing T cell subsets of peripheral blood from recipients of long-term functioning (more than 60 months) biological and mechanical heart valve prostheses. The absolute and relative number of CD4 and CD8 T cell subsets was analyzed: naïve (N, CD45RA(+)CD62L(+)), central memory (CM, CD45RA(-)CD62L(+)), effector memory (EM, CD45RA(-)CD62L(-)), and terminally differentiate...
conclusions moderate ppm has no negative effect on echocardiographic trans-aortic pressure gradients or the patients’ nyha functional status after avr with a carbomedics prosthesis in the mid-term follow up. results of the 66 studied patients, 39 were male and 27 were female. the mean age of the patients was 43 ± 17 with a range of 6 - 76 years. implanted sizes of the carbomedics av prosthesis ...
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