[Elective Mitral Valve Repair for Acute Mitral Regurgitation Due to Anterior Papillary Muscle Rupture:Report of a Case].

An 83-year-old woman with congestive heart failure due to severe mitral regurgitation was referred to our department. Because acute coronary syndrome was suspected, the patient underwent emergent coronary artery angiography, which showed 75% stenosis of segment 2 and 90% stenosis of segment 11. Subsequently, segment 11 was treated by percutaneous coronary intervention. Additionally, transesophageal echocardiography findings showed a prolapse of P2 due to papillary muscle rupture. After management of heart failure, a scheduled operation was performed under the diagnosis of acute mitral regurgitation due to papillary muscle rupture. Intraoperative findings demonstrated a rupture of the anterior papillary muscle, prolapse of P2, and no evidence of infection. The patient underwent mitral valve repair with artificial chordae through median sternotomy. Her postoperative course was uneventful.