Pseudoaneurysm of ascending aorta following cardiac surgery is a very rare and life threatening entity due to risk of exsanguination from its rupture. This is a case report of a 39 year old male patient who presented with impending rupture of ascending aorta pseudoaneurysm following mitral valve replacement. He underwent urgent reoperation under femoro-femoral cardiopulmonary bypass and deep hypothermic circulatory arrest. The pseudoaneurysm was excised and repaired with pericardial patch. He was discharged after an uneventful postoperative course.