title: Multi Versus Single Arterial Coronary Bypass Graft Surgery Across the Ejection Fraction Spectrum.
abstract: BACKGROUND
  Left internal thoracic artery (LITA) and radial artery (RA) multi-arterial CABG (MABG) is generally associated with improved long-term survival compared with traditional LITA and saphenous vein single arterial CABG (SABG). We examined the hypothesis that this multi-arterial survival advantage persists irrespective of left ventricular ejection fraction (LVEF).
  
  
  METHODS
  We retrospectively analyzed the primary, non-salvage multi-graft CABG experience (n = 11,261; 64.4 ± 10.4 years, 70.4% men) from 2 institutions (1995 to 2011). Risk-adjusted 15-year survival was pairwise compared for the MABG versus SABG grafting approaches within 3 LVEF subcohorts (>0.50, n = 4,833 [44% MABG]; 0.36 to 0.50, n = 4,465 [39% MABG]; and ≤ 0.35, n = 1,963 [35% MABG]) using propensity-matched and covariate adjusted Cox regression (all patients) comparisons.
  
  
  RESULTS
  Propensity matching yielded 1,317 (LVEF > 0.50), 1,179 (LVEF, 0.36 to 0.50), and 470 (LVEF ≤ 0.35) well-matched grafting method pairs. Acute perioperative mortality was equivalent between MABG and SABG within each LVEF group, but increased with decreasing LVEF. MABG was uniformly associated with better 15-year survival compared with SABG for all LVEF categories. The associated matched-adjusted hazard ratios (95% confidence intervals) were consistent across EF groups at 0.79 (0.68 to 0.93), 0.80 (0.69 to 0.93), and 0.82 (0.66 to 1.0), respectively. Covariate adjusted HR in all patients concurred with matched results.
  
  
  CONCLUSIONS
  MABG results in significantly enhanced long-term survival compared with LITA/SVG SABG regardless of the degree of LV dysfunction. These results favor MABG as the therapy of choice in patients with LV dysfunction.
authors.affiliation: Department of Surgery, University of Toledo Medical Center, Toledo, Ohio.
authors.forename: Thomas A
authors.initials: TA
authors.lastname: Schwann
authors.affiliation: Vascular Medicine Program, American University of Beirut, Beirut, Lebanon.
authors.forename: Laila
authors.initials: L
authors.lastname: Al-Shaar
authors.affiliation: Department of Anesthesiology, University of Michigan, Ann Arbor, Michigan.
authors.forename: Robert F
authors.initials: RF
authors.lastname: Tranbaugh
authors.affiliation: Department of Anesthesiology, University of Michigan, Ann Arbor, Michigan.
authors.forename: Kamellia R
authors.initials: KR
authors.lastname: Dimitrova
authors.affiliation: Department of Anesthesiology, University of Michigan, Ann Arbor, Michigan.
authors.forename: Darryl M
authors.initials: DM
authors.lastname: Hoffman
authors.affiliation: Department of Anesthesiology, University of Michigan, Ann Arbor, Michigan.
authors.forename: Charles M
authors.initials: CM
authors.lastname: Geller
authors.affiliation: Mercy Saint Vincent Medical Center, Toledo, Ohio; Department of Internal Medicine, American University of Beirut, Beirut, Lebanon.
authors.forename: Milo C
authors.initials: MC
authors.lastname: Engoren
authors.affiliation: Department of Surgery, University of Toledo Medical Center, Toledo, Ohio.
authors.forename: Mark R
authors.initials: MR
authors.lastname: Bonnell
authors.affiliation: Vascular Medicine Program, American University of Beirut, Beirut, Lebanon; Department of Surgery, Mount Sinai Beth Israel Medical Center, New York, New York. Electronic address: rh106@aub.edu.lb.
authors.forename: Robert H
authors.initials: RH
authors.lastname: Habib
mesh_terms: D001026:Coronary Artery Bypass / Q000379:methods*; D003324:Coronary Artery Disease / Q000150:complications / Q000503:physiopathology / Q000601:surgery*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies; D013318:Stroke Volume; D018487:Ventricular Dysfunction, Left / Q000150:complications / Q000503:physiopathology / Q000601:surgery