ABSTRACT
A 71-year-old woman with a history of closed commissurotomy for mitral valve stenosis 44 year ago, was diagnosed with left ventricular aneurysm by transthoracic echocardiography. She had no symptom of left ventricular aneurysm. Since there was a high risk of left ventricular rupture, we decided to undertake surgical treatment. During the surgery, we found artificial material near the left ventricular aneurysm. We resected the aneurysm wall and closed the ventricular wall using felt strip reinforcement. The wall of the aneurysm had no myocardium upon pathological examination. We diagnosed that it was a left ventricular pseudoaneurysm, and it seemed to be formed by blood oozing from the apical repair point of the hole for the dilator to perform mitral valvulotomy. The postoperative course was uneventful and she was discharged on postoperative day 20. Left ventricular pseudoaneurysm often results after myocardial infarction, and reports after cardiac surgery are rare, except in cases after mitral valve replacement. We hereby report our experience with this rare case