[Echocardiographic evaluation of the effect after BN-mode heterograft valve replacement (author's transl)].
D001021:Aortic Valve / Q000601:surgery; D001705:Bioprosthesis; D004452:Echocardiography; D006350:Heart Valve Prosthesis; D006801:Humans; D008943:Mitral Valve / Q000601:surgery