title: Blood loss from coronary angiography increases transfusion requirements for coronary artery bypass graft surgery.
abstract: OBJECTIVE
  To determine the blood loss associated with coronary angiography and its impact on hemoglobin and transfusion requirements for subsequent coronary artery bypass graft (CABG) surgery.
  
  
  METHODS
  Retrospective chart review.
  
  
  METHODS
  Tertiary-care, academic medical center.
  
  
  METHODS
  A total of 506 adult patients undergoing coronary angiography and CABG surgery.
  
  
  METHODS
  None (observational study).
  
  
  RESULTS
  Coronary angiography was associated with a reduction in hemoglobin of 1.8 g/dL. This reduction in hemoglobin was a significant predictor of allogeneic red blood cell transfusion.
  
  
  CONCLUSIONS
  Coronary angiography contributes to a 1.8 g/dL reduction in hemoglobin concentration before CABG surgery and was associated with increased transfusion of allogeneic blood products. Measures aimed at maintaining red cell volume during coronary angiography, increasing erythropoiesis, or delaying surgery beyond 2 weeks may result in a decrease in transfusion requirements for patients undergoing CABG surgery.
authors.affiliation: Department of Anesthesiology, Mayo Clinic, Rochester, MN 55905, USA.
authors.forename: M H
authors.initials: MH
authors.lastname: Ereth
authors.forename: G A
authors.initials: GA
authors.lastname: Nuttall
authors.forename: T A
authors.initials: TA
authors.lastname: Orszulak
authors.forename: P J
authors.initials: PJ
authors.lastname: Santrach
authors.forename: W P
authors.initials: WP
authors.lastname: Cooney
authors.forename: W C
authors.initials: WC
authors.lastname: Oliver
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000704:Analysis of Variance; D016063:Blood Loss, Surgical / Q000503:physiopathology*; D001803:Blood Transfusion; D001810:Blood Volume / Q000502:physiology; D017023:Coronary Angiography / Q000009:adverse effects*; D001026:Coronary Artery Bypass / Q000009:adverse effects*; D017707:Erythrocyte Transfusion; D004920:Erythropoiesis; D005260:Female; D006454:Hemoglobins / Q000378:metabolism; D006801:Humans; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies
chemical_list: D006454:Hemoglobins