title: Prognostic impact of blood transfusion after primary angioplasty for acute myocardial infarction: analysis from the CADILLAC (Controlled Abciximab and Device Investigation to Lower Late Angioplasty Complications) Trial.
abstract: OBJECTIVE
  We sought to determine the relationship between red blood cell (RBC) transfusion and clinical outcomes in patients undergoing primary percutaneous coronary intervention (PCI) for acute myocardial infarction (AMI).
  
  
  BACKGROUND
  The implications of RBC transfusion in patients undergoing primary PCI for AMI have not been evaluated.
  
  
  METHODS
  Clinical outcomes of patients from the prospective, randomized CADILLAC (Controlled Abciximab and Device Investigation to Lower Late Angioplasty Complications) trial were analyzed by administration of in-hospital RBC transfusion not related to coronary artery bypass surgery.
  
  
  RESULTS
  Of 2,060 randomized patients, 82 (3.98%) received RBC transfusion during the index hospitalization, including 33 (1.60%) with moderate/severe bleeding and 49 (2.38%) without overt major bleeding. Transfusion was independently associated with baseline anemia (odds ratio [95% confidence interval]: 4.44 [2.60 to 7.58], p < 0.0001), older age (1.03 [1.01 to 1.06], p = 0.002), triple-vessel disease (2.54 [1.47 to 4.38], p = 0.0008), and female sex (1.04 [1.02 to 1.06], p = 0.0008). Patients transfused versus not transfused had significantly higher rates of 1-year mortality (23.9% vs. 3.4%), disabling stroke (2.5% vs. 0.5%), reinfarction (7.0% vs. 2.2%), and composite major adverse cardiac events (41.0% vs. 16.6%) (all p values < 0.01). After multivariable adjustment for potential confounders including transfusion propensity, RBC transfusion was independently associated with mortality at 30 days (hazards ratio: 4.71, p = 0.0005) and 1 year (hazards ratio: 3.16, p = 0.0005).
  
  
  CONCLUSIONS
  An RBC transfusion after primary PCI in AMI may be harmful, which is consistent with the findings from other studies after PCI in the noninfarct setting. Alternatively, RBC transfusion may be a marker of markedly increased risk. Randomized studies are warranted to determine the optimal threshold for RBC transfusion in patients with AMI undergoing mechanical reperfusion therapy.
authors.affiliation: Columbia University Medical Center and the Cardiovascular Research Foundation, New York, NY 10032, USA.
authors.forename: Eugenia
authors.initials: E
authors.lastname: Nikolsky
authors.forename: Roxana
authors.initials: R
authors.lastname: Mehran
authors.forename: H Mehrdad
authors.initials: HM
authors.lastname: Sadeghi
authors.forename: Cindy L
authors.initials: CL
authors.lastname: Grines
authors.forename: David A
authors.initials: DA
authors.lastname: Cox
authors.forename: Eulogio
authors.initials: E
authors.lastname: Garcia
authors.forename: James E
authors.initials: JE
authors.lastname: Tcheng
authors.forename: John J
authors.initials: JJ
authors.lastname: Griffin
authors.forename: Giulio
authors.initials: G
authors.lastname: Guagliumi
authors.forename: Thomas
authors.initials: T
authors.lastname: Stuckey
authors.forename: Mark
authors.initials: M
authors.lastname: Turco
authors.forename: Martin
authors.initials: M
authors.lastname: Fahy
authors.forename: Alexandra J
authors.initials: AJ
authors.lastname: Lansky
authors.forename: Gregg W
authors.initials: GW
authors.lastname: Stone
mesh_terms: D000077284:Abciximab; D000367:Age Factors; D000368:Aged; D000740:Anemia / Q000150:complications; D015906:Angioplasty, Balloon, Coronary / Q000009:adverse effects* / Q000295:instrumentation / Q000401:mortality; D000911:Antibodies, Monoclonal / Q000627:therapeutic use*; D017707:Erythrocyte Transfusion / Q000009:adverse effects* / Q000401:mortality; D005260:Female; D006331:Heart Diseases / Q000209:etiology; D006801:Humans; D007140:Immunoglobulin Fab Fragments / Q000627:therapeutic use*; D053208:Kaplan-Meier Estimate; D008297:Male; D008875:Middle Aged; D009203:Myocardial Infarction / Q000000981:diagnostic imaging / Q000401:mortality / Q000628:therapy*; D016017:Odds Ratio; D010975:Platelet Aggregation Inhibitors / Q000627:therapeutic use*; D016016:Proportional Hazards Models; D011446:Prospective Studies; D011859:Radiography; D012008:Recurrence; D018570:Risk Assessment; D012307:Risk Factors; D012720:Severity of Illness Index; D012737:Sex Factors; D020521:Stroke / Q000209:etiology; D013997:Time Factors; D016896:Treatment Outcome
chemical_list: D000911:Antibodies, Monoclonal; D007140:Immunoglobulin Fab Fragments; D010975:Platelet Aggregation Inhibitors; D000077284:Abciximab