title: One center experience in China.
abstract: OBJECTIVE
  To investigate the outcomes and prognostic factors for patients with coronary artery disease and low left ventricular ejection fraction (LVEF≤40%) undergoing off-pump coronary artery bypass grafting OPCAB).
  
  
  METHODS
  From 2001 to 2004, 71 patients with low EF undergoing OPCABG in our hospital, the mean age is 65.0±9.0 years (from 37 to 81), 49 males and 16 females, the mean EF was 33.8±5.0%. Regular follow-up evaluation was completed. Draw the Kaplan-Meier survival curves, Use the log-rank test and Cox regression model to find out the factors that affect the long-term result.
  
  
  RESULTS
  71 low LVEF patients, 6 patients died perioperative, 63 patients discharged successfully, the follow-up time was 64.9±30.4 months. 6 patients lost of follow up, 19 patients died during follow-up including 10 patients (15.9%) who had cardiac-related death. The survival rate at 1, 3, 5 and 8 years was 95.1%, 93.3%, 86.3%, 77.7%, respectively. Univariate analysis shows EF≤30% and acute myocardial infarction within 30 days are risk factors for the long-term survival (P<0.05). Cox regression analysis showed that EF≤30% (RR=6.446, P<0.05) and acute myocardial infarction within 30 days (RR=5.993, P<0.05) are two independent risk factors for the cardiac-related death after discharge.
  
  
  CONCLUSIONS
  The patients with low eject fraction ventricular have satisfactory outcomes after OPCAB. LVEF≤30% and acute myocardial infarction within 30 days are two independent risk factors that affect the long-term outcome.
authors.affiliation: Department of Cardiac Surgery, Peking University Third Hospital Beijing 100049, China.
authors.forename: Yunpeng
authors.initials: Y
authors.lastname: Ling
authors.affiliation: Department of Cardiac Surgery, Peking University People's Hospital Beijing 100044, China.
authors.forename: Xi
authors.initials: X
authors.lastname: Liu
authors.affiliation: Department of Cardiac Surgery, Peking University People's Hospital Beijing 100044, China.
authors.forename: Yu
authors.initials: Y
authors.lastname: Chen
authors.affiliation: Department of Cardiac Surgery, Peking University People's Hospital Beijing 100044, China.
authors.forename: Shenglong
authors.initials: S
authors.lastname: Chen
authors.affiliation: Department of Cardiac Surgery, Peking University People's Hospital Beijing 100044, China.
authors.forename: Xinxin
authors.initials: X
authors.lastname: Jin
authors.affiliation: Department of Cardiac Surgery, Peking University People's Hospital Beijing 100044, China.
authors.forename: Suixin
authors.initials: S
authors.lastname: Dong
authors.affiliation: Department of Cardiac Surgery, Peking University Third Hospital Beijing 100049, China.
authors.forename: Feng
authors.initials: F
authors.lastname: Wan
keywords: Low eject fraction; artery bypass grafting; off-pump; survival analysis