159: Preoperative atrial fibrillation predicts outcome after valve repair for mitral valve prolapse

Background The aim of this study is to assess the impact of preoperative AF on outcome in patients undergoing MVR for mitral valve prolapse (MVP). Methods Between 1991 and 2009, 348 consecutive patients underwent MVR for MR due to MVP (follow-up: mean duration 105±50 months). Echocardiography was performed preoperatively and 9 to 12 months after surgery. Post operative left ventricular dysfunction (LVD) was defined as ejection fraction (EF) Results There were 81 patients (23.3%) in AF at baseline. Preoperative EF decreased from 67.2±9.6% to 58.9±10.1% post operatively (p Conclusion Preoperative AF is an independent predictor of long term mortality and post-operative LVD after MVR for MPV.