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Updated: Jun 4, 2026

Surgical Porcine Model of Chronic Myocardial Ischemia Treated by Exosome-laden Collagen Patch and Off-pump Coronary Artery Bypass Graft

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Does preoperative clopidogrel increase bleeding after coronary bypass surgery?

Charumathi Dasarathan¹, Karthik Vaidyanathan, Deepthi Chandrasekaran

¹Department of Cardiothoracic Surgery, Frontier Lifeline, Dr KM Cherian Heart Foundation, Mogappair, Chennai, India.

Asian Cardiovascular & Thoracic Annals

|March 2, 2011

Summary

Patients undergoing coronary artery bypass grafting who took clopidogrel within 5 days of surgery did not experience increased bleeding or transfusion needs. Stopping clopidogrel >5 days prior did not significantly alter outcomes.

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Interventional Diagnostic Procedure: A Practical Guide for the Assessment of Coronary Vascular Function

Interventional Diagnostic Procedure: A Practical Guide for the Assessment of Coronary Vascular Function

Published on: March 15, 2022

Area of Science:

Cardiology
Cardiovascular Surgery
Pharmacology

Background:

Antiplatelet therapy, like clopidogrel, reduces cardiac events in acute coronary syndrome.
However, these therapies increase bleeding risk, posing challenges for patients needing surgery.

Purpose of the Study:

To evaluate if clopidogrel use within 5 days of coronary artery bypass grafting (CABG) impacts bleeding outcomes.
To compare transfusion requirements in patients with different clopidogrel cessation timings before CABG.

Main Methods:

A study of 342 patients undergoing elective on-pump CABG between 2004 and 2008.
Patients were divided into two groups: clopidogrel stopped >5 days before surgery (n=191) and ≤5 days before surgery (n=151).
Bleeding outcomes (drainage at 8h, 12h, and total) and blood product transfusion needs were assessed.

Main Results:

No significant differences in postoperative drainage were observed between the groups.
Blood product usage was similar for patients who stopped clopidogrel >5 days earlier versus ≤5 days before surgery.
No instances of reoperation for hemostasis occurred in either group.

Conclusions:

Preoperative clopidogrel exposure, even within 5 days of surgery, does not elevate the risk of bleeding complications or transfusion needs during CABG.
Current guidelines on clopidogrel cessation before CABG may not be necessary to prevent hemostatic complications.