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Acute clopidogrel use and outcomes in patients with non-ST-segment elevation acute coronary syndromes undergoing
Rajendra H Mehta1, Matthew T Roe, Jyotsna Mulgund
1Division of Cardiology and the Duke Clinical Research Institute, Durham, North Carolina 27715, USA. mehta007@dcri.duke.edu
Insights
Clopidogrel use before coronary artery bypass grafting (CABG) in non-ST-segment elevation acute coronary syndromes (NSTE ACS) patients often occurs within 5 days. This timing is linked to increased blood transfusion needs, highlighting a gap between guidelines and practice.
Area of Science:
- Cardiology
- Clinical Pharmacology
Background:
- Current adherence to guidelines for clopidogrel use in non-ST-segment elevation acute coronary syndromes (NSTE ACS) patients undergoing coronary artery bypass grafting (CABG) is not well-characterized.
- Investigating clopidogrel's impact on postoperative transfusions is crucial for patient outcomes.
Purpose of the Study:
- To characterize clopidogrel use patterns before CABG in NSTE ACS patients.
- To examine the association between clopidogrel administration timing and postoperative transfusion risks.
Main Methods:
- A cohort of 2,858 NSTE ACS patients undergoing CABG was analyzed from the CRUSADE Initiative.
- Clopidogrel use patterns and transfusion risks were assessed based on CABG timing: early (≤5 days) versus late (>5 days) post-catheterization.
Main Results:
- 30% of patients received clopidogrel within 24 hours of admission; 87% underwent CABG ≤5 days after treatment, contravening guidelines.
- Early CABG (≤5 days) after clopidogrel was associated with significantly higher blood transfusion rates (65.0% vs. 56.9%) and need for ≥4 units (27.7% vs. 18.4%).
- Delayed CABG (>5 days) showed no significant association with increased bleeding risks.
Conclusions:
- Most NSTE ACS patients treated with clopidogrel undergo early CABG, deviating from recommended guidelines.
- Failure to delay CABG post-clopidogrel increases transfusion requirements, necessitating a balance with potential delay impacts.
Objectives:
We sought to characterize patterns of clopidogrel use before coronary artery bypass grafting (CABG) and examine the drug's impact on risks for postoperative transfusions among patients with non-ST-segment elevation acute coronary syndromes (NSTE ACS).
Background:
Adherence in community practice to American College of Cardiology/American Heart Association guidelines for clopidogrel use among NSTE ACS patients has not been previously characterized.
Methods:
We evaluated 2,858 NSTE ACS patients undergoing CABG at 264 hospitals participating in the CRUSADE (Can Rapid Risk Stratification of Unstable Angina Patients Suppress Adverse Outcomes With Early Implementation of the ACC/AHA Guidelines) Initiative. We examined the patterns of acute clopidogrel therapy and its association with bleeding risks among those having "early" CABG < or =5 days and again among those having "late" surgery >5 days after catheterization.
Results:
Within 24 h of admission, 852 patients (30%) received clopidogrel. In contrast to national guidelines, 87% of clopidogrel-treated patients underwent CABG < or =5 days after treatment. Among those receiving CABG within < or =5 days of last treatment, the use of clopidogrel was associated with a significant increase in blood transfusions (65.0% vs. 56.9%, adjusted odds ratio [OR] 1.36, 95% confidence interval [CI] 1.10 to 1.68) as well as the need for transfusion of > or =4 U of blood (27.7% vs. 18.4%, OR 1.70, 95% CI 1.32 to 2.19). In contrast, acute clopidogrel therapy was not associated with higher bleeding risks if CABG was delayed >5 days (adjusted OR 1.18, 95% CI 0.54 to 2.58).
Conclusions:
Despite guideline recommendations, the overwhelming majority of NSTE ACS patients treated with acute clopidogrel needing CABG have their surgery within < or =5 days of treatment. A failure to delay surgery is associated with increased blood transfusion requirements that must be weighed against the potential clinical and economic impacts of such delays.
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