• J. Am. Coll. Cardiol. · Nov 2008

    Multicenter Study Comparative Study

    Impact of clopidogrel in patients with acute coronary syndromes requiring coronary artery bypass surgery: a multicenter analysis.

    • Jeffrey S Berger, Carla B Frye, Qing Harshaw, Fred H Edwards, Steven R Steinhubl, and Richard C Becker.
    • Division of Cardiology, Duke University School of Medicine, Duke Clinical Research Institute, Durham, North Carolina 27705, USA.
    • J. Am. Coll. Cardiol. 2008 Nov 18;52(21):1693-701.

    ObjectivesThe purpose of our multicenter study was to examine the impact of pre-operative administration of clopidogrel on reoperation rates, incidence of life-threatening bleeding, inpatient length of stay, and other bleeding-related outcomes in acute coronary syndrome (ACS) patients requiring cardiopulmonary bypass (coronary artery bypass graft surgery [CABG]) in a broad cross section of U.S. hospitals.BackgroundThere is relative uncertainty about the relationship between clopidogrel and CABG-associated outcomes in the setting of ACS.MethodsA retrospective cohort analysis was performed of randomly selected ACS patients requiring CABG in 14 hospitals across the U.S. Patients exposed to clopidogrel were compared with those not exposed to clopidogrel within 5 days prior to surgery.ResultsOf the 596 patients enrolled in the study, 298 had been exposed to clopidogrel within 5 days (Group A). Patients in Group A were more than 3-fold more likely to require reoperation for assessment of bleeding than patients not exposed to clopidogrel (6.4% vs. 1.7% Group B, p = 0.004). Major bleeding occurred in 35% of Group A patients versus 26% of Group B patients (p = 0.049). Length of stay was greater in Group A compared with Group B (9.7 +/- 6.0 days vs. 8.6 +/- 4.7 days, unadjusted p = 0.016). After logistic regression analysis, clopidogrel exposure within 5 days of CABG was the strongest predictor of reoperation (odds ratio [OR]: 4.60, 95% confidence interval [CI]: 1.45 to 14.55) and major bleeding (OR: 1.824, 95% CI: 1.106 to 3.008).ConclusionsAfter ACS, patients who undergo CABG within 5 days of receiving clopidogrel are at increased risk for reoperation, major bleeding, and increased length of stay. These risks must be balanced by the clinical benefits of clopidogrel use demonstrated in randomized clinical trials.

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