Results 321 to 330 of about 435,399 (363)
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New England Journal of Medicine, 1996
Since the 1950s more than 80 models of prosthetic heart valves have been developed and used. More than 60,000 valve replacements are performed annually in the United States. Prosthetic heart valves may be mechanical or bioprosthetic. Mechanical valves, which are composed primarily of metal or carbon alloys, are classified according to their structure ...
W, Vongpatanasin +2 more
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Since the 1950s more than 80 models of prosthetic heart valves have been developed and used. More than 60,000 valve replacements are performed annually in the United States. Prosthetic heart valves may be mechanical or bioprosthetic. Mechanical valves, which are composed primarily of metal or carbon alloys, are classified according to their structure ...
W, Vongpatanasin +2 more
openaire +2 more sources
Biochimica et Biophysica Acta (BBA) - Protein Structure, 1977
A hydroxylysine-rich type I collagen has been isolated from pepsin-digested porcine heart valve. The ratio of alpha1 to alpha2 in the isolated molecule was 2:1. The component alpha chains exhibited unusual chromatographic behavior in comparison to corresponding chains from human dermis and lathyritic rat skin collagen.
D, Collins +3 more
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A hydroxylysine-rich type I collagen has been isolated from pepsin-digested porcine heart valve. The ratio of alpha1 to alpha2 in the isolated molecule was 2:1. The component alpha chains exhibited unusual chromatographic behavior in comparison to corresponding chains from human dermis and lathyritic rat skin collagen.
D, Collins +3 more
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Current Opinion in Cardiology, 1993
Progress in valve repair and replacement continued over the past year. Aortic valve repair for aortic insufficiency appears promising, and aortic decalcification may still be a useful alternative in certain cases of aortic stenosis. Mitral valve repair, well accepted for myxomatous valves, presents a challenge in ischemic disease.
C M, Feindel, T E, David
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Progress in valve repair and replacement continued over the past year. Aortic valve repair for aortic insufficiency appears promising, and aortic decalcification may still be a useful alternative in certain cases of aortic stenosis. Mitral valve repair, well accepted for myxomatous valves, presents a challenge in ischemic disease.
C M, Feindel, T E, David
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Valve‐in‐valve‐in‐valve: Treating endocarditis of a transcatheter heart valve
Catheterization and Cardiovascular Interventions, 2015Transcatheter heart valve endocarditis is a rare, but life threatening complication. We describe the case of a patient who was successfully treated by transcatheter aortic valve‐in‐valve‐in‐valve replacement with a favorable 1‐year outcome, despite severe early complications. © 2015 Wiley Periodicals, Inc.
Caroline, Nguyen +2 more
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Choosing A Prosthetic Heart Valve
Cardiology Clinics, 1991Although most of the available prosthetic heart valves function remarkably well, the variety of available choices attests to the inability of any single one to fulfill the requirements of the ideal valve substitute. The mechanical prostheses include the caged-ball, tilting-disc, and bileaflet valves. Tissue valves available in the United States are the
J A, Wernly, M H, Crawford
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Valvular heart disease, infected valves and prosthetic heart valves
The American Journal of Cardiology, 1990The major causes of systemic embolism from valvular heart disease (mitral, aortic and mitral valve prolapse), prosthetic valves (both mechanical and tissue valves) and infected valves (endocarditis) are reviewed from the standpoint of their incidence and complications.
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Mechanical heart valve cavitation
Expert Review of Medical Devices, 2004Cavitation was first directly related to mechanical heart valves in the mid 1980s after a series of valve failures observed with the Edwards-Duromedics valve. The damages observed indicated that cavitation could be responsible. Later, several in vitro studies visualized the bubble formation and collapse of cavitation at mechanical heart valves.
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A framework for developing sex-specific engineered heart models
Nature Reviews Materials, 2021Sharon Fleischer +2 more
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