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Tissue heart valves are usually made from animal tissue (heterografts) mounted on a metal or polymer support. [14] Bovine (cow) tissue is most commonly used, but some are made from porcine (pig) tissue. [15] The tissue is treated to prevent rejection and calcification (where calcium builds up on the replacement valve and stops it working ...
Mitral valve replacement is a procedure whereby the diseased mitral valve of a patient's heart is replaced by either a mechanical or tissue (bioprosthetic) valve. The mitral valve may need to be replaced because: [citation needed] The valve is leaky (mitral valve regurgitation) The valve is narrowed and doesn't open properly (mitral valve stenosis)
Valve replacement surgery is the replacement of one or more of the heart valves with either an artificial heart valve or a bioprosthesis (homograft from human tissue or xenograft e.g. from pig). It is an alternative to valve repair .
Advisers to the U.S. Food and Drug Administration on Tuesday backed an approval for Abbott Laboratories' heart valve repair device that is designed for patients who are at risk of complications or ...
An artificial heart valve is a one-way valve implanted into a person's heart to replace a heart valve that is not functioning properly (valvular heart disease). Artificial heart valves can be separated into three broad classes: mechanical heart valves, bioprosthetic tissue valves and engineered tissue valves.
Biologic/tissue replacement valves have a tendency to degenerate, and there is also an increased risk of infections of valve prosthesis (prosthetic valve endocarditis). Compared to the results of valve replacement there will be a minimal tendency towards clot formation after aortic valve repair, and anticoagulation is commonly not necessary ...
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