Study design:
Between June 2010 and December 2016, 241 patients underwent an isolated mitral valve (MV) surgery in our center. Patients who had active endocarditis and/or MV stenosis were excluded. Propensity-score matching for 10 baseline characteristics was used (Tab 1). 128 patients were identified and classified into two groups; MV repair group (MVRe) and MV replacement group (MVRp), with 64 patients in each group respectively. The median follow-up was 5.5 years (0.003-9.101) after surgery. The Indication of surgery was moderate to severe MVR, and we classified the MV pathology based on the Carpentier classification (Cc).