[Hancock bioprosthetic valve dysfunction in a long-term postoperative period--report of 3 cases].
D000328:Adult; D001705:Bioprosthesis; D005260:Female; D005500:Follow-Up Studies; D006350:Heart Valve Prosthesis; D006801:Humans; D008297:Male; D008875:Middle Aged; D008944:Mitral Valve Insufficiency / Q000601:surgery*; D011184:Postoperative Period; D011475:Prosthesis Failure