title: Early results of off-pump coronary artery bypass: retrospective consecutive comparative study.
abstract: OBJECTIVE
  The purpose of this study is to compare the operative results of off-pump coronary artery bypass (OPCAB) and on-pump (conventional) coronary artery bypass (CCAB), to clarify qualitative problems and whether OPCAB is less invasive or not.
  
  
  METHODS
  OPCAB was consecutively performed in 63 patients and CCAB in 63 patients between July 1998 and December 2003.
  
  
  RESULTS
  The mean number of bypass grafts was 2.43 +/- 0.82 in the OPCAB group and 2.70 +/- 0.71 in the CCAB group (p = 0.096). In-hospital mortality was 0% in the OPCAB group and 3.2% in the CCAB group. The incidence of perioperative myocardial infarction was 0% in the OPCAB group and 3.2% in the CCAB group. The incidence of postoperative major complications was significantly lower in the OPCAB group than in the CCAB group (OPCAB group=4 complications, CCAB group=13 complications). Cerebrovascular accidents occurred in 1.6% of patients in both groups. The incidence of sternal infection or mediastinitis was 0% in the OPCAB group and 3.2% in the CCAB group. The early patency rate of graft was 94.0% in the OPCAB group and 92.8% in the CCAB group, and was not significantly different (p = 0.822).
  
  
  CONCLUSIONS
  Operative mortality and major complications after surgery in OPCAB were lower than that in CCAB. The early patency rate in OPCAB was as good as that in CCAB. It is considered that OPCAB is less invasive and the quality of bypass in OPCAB is as good as that in CCAB.
authors.affiliation: Department of General Surgery, Graduate School of Medicine, Chiba University, Chiba University Hospital, Chiba, Japan.
authors.forename: Mizuho
authors.initials: M
authors.lastname: Imamaki
authors.forename: Atsushi
authors.initials: A
authors.lastname: Ishida
authors.forename: Hitoshi
authors.initials: H
authors.lastname: Shimura
authors.forename: Hiroki
authors.initials: H
authors.lastname: Kohno
authors.forename: Keiichi
authors.initials: K
authors.lastname: Ishida
authors.forename: Yuriko
authors.initials: Y
authors.lastname: Niitsuma
authors.forename: Masaru
authors.initials: M
authors.lastname: Miyazaki
mesh_terms: D000368:Aged; D001026:Coronary Artery Bypass / Q000009:adverse effects / Q000379:methods; D047549:Coronary Artery Bypass, Off-Pump / Q000009:adverse effects; D003327:Coronary Disease / Q000601:surgery*; D005260:Female; D006801:Humans; D008297:Male; D016896:Treatment Outcome; D014654:Vascular Patency