title: Aortic and mitral prosthetic valve replacement in age groups 61-65 & 66-70 years.
abstract: Prosthesis choice for aortic and mitral valve replacements in patients aged 61-70 years is difficult. We evaluated prostheses in age groups 61-65 and 66-70 years. Freedom from major thromboembolism and hemorrhage was greater for bioprostheses than mechanical prostheses in both age groups after aortic valve replacement, but only in the younger age group after mitral valve replacement. Freedom from valve-related re-operation was greater after mitral valve replacement with mechanical prostheses in both age groups, but no difference after aortic valve replacement. Valve type was predictive of major thromboembolism and hemorrhage, except in older patients undergoing mitral valve replacement. Bioprostheses are favored for aortic valve replacement in both age groups, but the risk of re-operation with a bioprosthesis in the mitral position in patients aged 61-65 years favors a mechanical prosthesis. Prosthesis choice is less definite in those aged 66-70 years.
authors: University of British Columbia, Vancouver, Canada.
authors: Kriengchai
authors: K
authors: Prasongsukarn
authors: W R Eric
authors: WR
authors: Jamieson
authors: Eva
authors: E
authors: Germann
authors: Florence
authors: F
authors: Chan
authors: Samuel V
authors: SV
authors: Lichtenstein
mesh_terms: D000367:Age Factors; D000368:Aged; D001021:Aortic Valve; D001705:Bioprosthesis; D002170:Canada / Q000453:epidemiology; D005260:Female; D006350:Heart Valve Prosthesis; D019918:Heart Valve Prosthesis Implantation / Q000009:adverse effects / Q000706:statistics & numerical data; D006801:Humans; D008297:Male; D008875:Middle Aged; D008943:Mitral Valve; D011183:Postoperative Complications / Q000453:epidemiology; D012189:Retrospective Studies