title: Effects of intracoronary compared to intravenous abciximab administration in patients undergoing transradial percutaneous coronary intervention: A sub-analysis of the EASY trial.
abstract: BACKGROUND
  In the EASY trial, we have shown the clinical equivalence between abciximab bolus-only and abciximab bolus followed by 12-h infusion in a wide spectrum of patients after percutaneous coronary intervention (PCI). Some reports have suggested better outcomes following intracoronary (IC) abciximab administration compared to intravenous (IV) delivery. We sought to compare cardiac biomarkers release and early and late clinical outcomes after IC or IV abciximab bolus delivery.
  
  
  METHODS
  From 1005 patients randomized in the EASY trial and undergoing transradial coronary stent implantation, 208 received IC abciximab bolus and 797 received IV abciximab bolus. Route of administration was left to operators' discretion. Creatine Kinase-MB, and Troponin-T (Tn-T) were obtained immediately prior to angiography, 4-6 h after PCI and the next day. MACE (death, MI, TVR) rate was evaluated at 30 days, 6 months and 12 months.
  
  
  RESULTS
  There were more patients with acute coronary syndrome (75% vs 64%, P=0.004) and previous MI (53% vs 42%, P=0.005) in the IC group and more patients with >or=3 dilated sites in the IV group (2% IC vs 7% IV, P=0.03). After PCI, the extent of Tn-T and CK-MB release remained comparable in both groups. The MACE rate was 2% in both groups at 30 days, 9% in IC bolus vs 5% in IV bolus (P=0.04) at 6 months and 10% in IC bolus vs 9% in IV bolus (P=0.50) at 12 months. By multivariate analysis, IC abciximab bolus was not associated with better outcomes at 12 months compared to IV bolus (HR 1.07, 95% CI 0.82-1.35, P=0.62).
  
  
  CONCLUSIONS
  Compared to IV abciximab administration, IC abciximab was not associated with less cardiac biomarkers release or better clinical outcomes after uncomplicated transradial PCI. Further studies are required in clinical scenarios including patients with higher thrombotic burden and/or occluded vessels as in primary and rescue PCI.
authors.affiliation: Hôpital Laval, Institut Universitaire de Cardiologie et de Pneumologie, Canada. olivier.bertrand@crhl.ulaval.ca
authors.forename: Olivier F
authors.initials: OF
authors.lastname: Bertrand
authors.forename: Josep
authors.initials: J
authors.lastname: Rodés-Cabau
authors.forename: Eric
authors.initials: E
authors.lastname: Larose
authors.forename: Can Manh
authors.initials: CM
authors.lastname: Nguyen
authors.forename: Jean-Pierre
authors.initials: JP
authors.lastname: Déry
authors.forename: Guy
authors.initials: G
authors.lastname: Proulx
authors.forename: Louis
authors.initials: L
authors.lastname: Roy
authors.forename: Paul
authors.initials: P
authors.lastname: Poirier
authors.forename: Olivier
authors.initials: O
authors.lastname: Costerousse
authors.forename: Robert
authors.initials: R
authors.lastname: De Larochellière
mesh_terms: D000077284:Abciximab; D000368:Aged; D015906:Angioplasty, Balloon, Coronary / Q000401:mortality; D000911:Antibodies, Monoclonal / Q000008:administration & dosage* / Q000009:adverse effects; D000925:Anticoagulants / Q000008:administration & dosage* / Q000009:adverse effects; D015415:Biomarkers / Q000097:blood; D003324:Coronary Artery Disease / Q000188:drug therapy* / Q000401:mortality; D005260:Female; D006801:Humans; D007140:Immunoglobulin Fab Fragments / Q000008:administration & dosage* / Q000009:adverse effects; D015552:Injections, Intralesional; D007275:Injections, Intravenous; D053208:Kaplan-Meier Estimate; D008297:Male; D008875:Middle Aged; D017534:Radial Artery; D015607:Stents
chemical_list: D000911:Antibodies, Monoclonal; D000925:Anticoagulants; D015415:Biomarkers; D007140:Immunoglobulin Fab Fragments; D000077284:Abciximab