title: Beating heart versus conventional single-vessel reoperative coronary artery bypass.
abstract: BACKGROUND
  Reoperative (redo) coronary artery bypass grafting (CABG) with cardiopulmonary bypass (on-pump) is associated with a higher morbidity and mortality than first-time CABG. It is unknown, however, whether CABG without cardiopulmonary bypass (off-pump) may yield an improved clinical outcome over conventional on-pump redo CABG.
  
  
  METHODS
  We compared the perioperative outcomes of patients with single-vessel disease who underwent on-pump (n = 41) versus off-pump (n = 91) redo CABG between April 1992 and July 1999. The two groups were similar with respect to baseline characteristics and risk stratification: mean Parsonnet scores were 26 +/- 9 for on-pump versus 24 +/- 8 for off-pump patients (p = nonsignificant).
  
  
  RESULTS
  On-pump redo patients had a higher rate of postoperative transfusions (58% on-pump versus 27% off-pump, p = 0.001), prolonged ventilatory support (17% on-pump versus 4% off-pump, p = 0.03), and a higher rate of postoperative atrial fibrillation (29% on-pump versus 14% off-pump, p = 0.04). On-pump redo CABG was also associated with prolonged postoperative length of stay (8 +/- 4 days on-pump versus 5 +/- 2 days off-pump, p < 0.001). In-hospital mortality was significantly higher in on-pump than in off-pump patients (10% versus 1%, p = 0.03).
  
  
  CONCLUSIONS
  Single-vessel off-pump redo CABG can be performed safely with a lower operative morbidity and mortality than on-pump CABG and an abbreviated hospital stay compared with conventional on-pump redo CABG.
authors.affiliation: Department of Surgery, Washington Hospital Center, and MedStar Research Institute, DC 20010, USA.
authors.forename: S C
authors.initials: SC
authors.lastname: Stamou
authors.forename: A J
authors.initials: AJ
authors.lastname: Pfister
authors.forename: G
authors.initials: G
authors.lastname: Dangas
authors.forename: M K
authors.initials: MK
authors.lastname: Dullum
authors.forename: S W
authors.initials: SW
authors.lastname: Boyce
authors.forename: A S
authors.initials: AS
authors.lastname: Bafi
authors.forename: J M
authors.initials: JM
authors.lastname: Garcia
authors.forename: P J
authors.initials: PJ
authors.lastname: Corso
mesh_terms: D000368:Aged; D001281:Atrial Fibrillation / Q000209:etiology; D001803:Blood Transfusion; D002315:Cardiopulmonary Bypass; D001026:Coronary Artery Bypass / Q000379:methods* / Q000401:mortality; D005260:Female; D006801:Humans; D007902:Length of Stay; D008297:Male; D011183:Postoperative Complications; D012086:Reoperation; D012121:Respiration, Artificial; D016896:Treatment Outcome