[Heart valve replacement in high risk patients].
D000368:Aged; D001705:Bioprosthesis; D004696:Endocarditis / Q000601:surgery; D005260:Female; D006330:Heart Defects, Congenital / Q000601:surgery; D006350:Heart Valve Prosthesis; D006351:Heart Valves / Q000601:surgery*; D006801:Humans; D008297:Male; D008875:Middle Aged; D011247:Pregnancy; D011248:Pregnancy Complications; D012306:Risk