[Echocardiographic characteristics of perivalvular leakage of the Björk-Shiley prosthetic heart valve in the mitral position].
D004452:Echocardiography; D006350:Heart Valve Prosthesis / Q000009:adverse effects*; D006801:Humans; D008297:Male; D008875:Middle Aged; D008943:Mitral Valve / Q000601:surgery; D008944:Mitral Valve Insufficiency / Q000175:diagnosis* / Q000601:surgery; D011183:Postoperative Complications