echocardiography: concentric regurgitation of prosthetic left atrioventricular valve
echocardiography: concentric regurgitation of prosthetic left atrioventricular valve
echocardiography: concentric regurgitation of prosthetic left atrioventricular valve (procedure)
echocardiography: concentric regurgitation of prosthetic left atrioventricular valve (procedure)