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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 .
Tissue valves are less durable than mechanical valves, typically lasting 10–20 years. [20] This means that people with bioprosthetic valves have a higher incidence of requiring another aortic valve replacement in their lifetime. [16] Bioprosthetic valves tend to deteriorate more quickly in younger patients. [21]
The valve is excised 4–5 mm from the annulus, leaving intact the attached chordae unless they are calcified or otherwise diseased. The valve is replaced by a mechanical or bioprosthetic valve. The replacement valve is sewn into the annulus with interrupted or horizontal mattress sutures with the pledgets on the atrial side. [17]
The Hancock Aortic Tissue Valve is commonly used in patients requiring aortic valve replacement due to conditions such as aortic stenosis or aortic regurgitation. [7] The choice between a mechanical or bioprosthetic valve depends on various factors, including the patient's age, lifestyle, and medical history. [8]
Tissue engineered heart valves (TEHV) offer a new and advancing proposed treatment of creating a living heart valve for people who are in need of either a full or partial heart valve replacement. Currently, there are over a quarter of a million prosthetic heart valves implanted annually, [ 1 ] and the number of patients requiring replacement ...
(A): The authors make a remark: Prior to heart valve replacement 86 patients suffered from infective endocarditis but only 9 of these patients developed recurrent infection following pericardial valve replacement. (B): Of the 17 cases of infection, 15 occurred between 1976 and 1981 and only 2 cases between 1981 and 1985. Ionescu's group took ...
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