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[A case report of infective endocarditis with total rupture of the posterior papillary muscle after aortic valve replacement].

We reported a case with severe mitral regurgitation caused by total rupture of the posterior papillary muscle two days after aortic valve replacement. A 62-year-old man was transferred to our hospital with high fever and dyspnea with severe aortic regurgitation caused by infective endocarditis. The left heart failure occurred suddenly two days after the initial operation. Echocardiogram revealed massive mitral regurgitation and rupture of the posterior papillary muscle. He underwent emergent mitral valve replacement. Histological examination of the papillary muscle showed typical ischemic necrosis without inflammation. The postoperative course was uneventful. We suggested the papillary muscle rupture in this case may be due to coronary artery emboli occurred in association with infective endocarditis.