Impact of clopidogrel use on mortality and major bleeding in patients undergoing coronary artery bypass surgery

Nahum Nesher*, Steve K. Singh, Hosam F. Fawzy, Jeri Y. Sever, Bernard E. Goldman, Gideon N. Cohen, Claude Laflamme, Stephen E. Fremes

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


Patients who received clopidogrel prior to coronary bypass surgery are at increased risk for bleeding that must be balanced with risk of ongoing ischemia if coronary artery bypass grafting is delayed. This study aimed to evaluate the impact of clopidogrel on mortality and major bleeding in patients undergoing urgent coronary bypass surgery. We reviewed 451 consecutive patients who underwent urgent isolated coronary bypass surgery; 262 had not received clopidogrel, whereas 189 received clopidogrel <5 days preoperative. The primary endpoint was in-hospital death, massive transfusion or massive blood loss. Patient characteristics were almost similar between groups. There was no difference in in-hospital death or massive bleeding indices between groups (clopidogrel: 7% vs. no clopidogrel: 6%, P=0.9). No difference was observed even after adjusting for the date of stopping clopidogrel preoperatively. Multivariate regression analysis showed that clopidogrel or the duration it was stopped preoperatively, did not predict adverse outcomes. Significant independent predictors included preoperative renal dysfunction, hemoglobin level and peripheral vascular disease. clopidogrel, or the time it was stopped prior to surgery, was not a risk factor for in-hospital death, massive bleeding, or other poor early outcomes in patients undergoing urgent coronary artery bypass surgery.

Original languageEnglish
Pages (from-to)732-736
Number of pages5
JournalInteractive Cardiovascular and Thoracic Surgery
Issue number5
StatePublished - May 2010
Externally publishedYes


  • Bleeding
  • Clopidogrel
  • Coronary artery bypass surgery
  • Mortality


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