Midterm Results of Completely Beating Mitral Valve Plasty for Mitral Valve Prolapse

Background: The configuration of the mitral valve under cardiac arrest differs significantly from the configuration while the heart is beating, which often makes it difficult to reproduce the configuration including the region of prolapse, and mitral valve plasty (MVP) is difficult under these circumstances. We retrospectively investigated cases where more than 5 years has passed since the surgery to ascertain the midterm outcomes of MVP under beating heart (bMVP) and compared these outcomes of MVP under cardiac arrest (aMVP) around the same time. Methods: 43 patients, whom more than 5 years had passed since MVP alone for mitral valve prolapse implemented between July 2009 and September 2013, were divided into two groups, bMVP (n=17) and aMVP (n=26), and the outcomes were compared. There were no significant differences in preoperative factors. Results: There were no patient deaths during the observation period. There were no significant differences in MR grade between two groups. There were also no significant differences in freedom from reoperation between two groups. Conclusion: When it is difficult to reproduce the configuration of mitral valve and the region of regurgitation under cardiac arrest during the operation, bMVP may be a useful option.