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Interventional Diagnostic Procedure: A Practical Guide for the Assessment of Coronary Vascular Function
Published on: March 15, 2022
Urgent or emergent coronary revascularization using bilateral internal thoracic artery after previous clopidogrel
B Gansera1, F Schmidtler, K Spiliopoulos
1Department of Cardiovascular Surgery, Klinikum Bogenhausen, Munich, Germany. herzchirurgie@kh-bogenhausen.de
Insights
Clopidogrel use before urgent coronary artery bypass grafting (CABG) increases bleeding complications, including higher chest tube output and re-exploration rates. However, using bilateral internal thoracic arteries (ITAs) is feasible despite clopidogrel exposure.
Area of Science:
- Cardiovascular Surgery
- Pharmacology
- Anesthesiology
Background:
- Clopidogrel is standard for stent thrombosis prevention but increases bleeding risks during urgent coronary artery bypass grafting (CABG).
- Evaluating clopidogrel's impact on bleeding complications in urgent CABG is crucial for patient safety.
Purpose of the Study:
- To assess the effect of pre-operative clopidogrel on bleeding complications in patients undergoing urgent CABG.
- To determine if using bilateral internal thoracic arteries (ITAs) is safe in patients with clopidogrel exposure.
Main Methods:
- Retrospective analysis of 128 patients undergoing urgent/emergent CABG using both ITAs.
- Comparison of 64 patients with recent clopidogrel/aspirin use versus 64 patients without clopidogrel.
- Evaluation of chest tube output, re-exploration, blood product use, ventilation time, and ICU stay.
Main Results:
- The clopidogrel group showed significantly higher chest tube output (977 vs. 788 ml) and re-exploration rates (7.81% vs. 0%).
- Increased need for blood products, particularly platelets, was observed in the clopidogrel group.
- No significant differences in mechanical ventilation time or ICU stay were noted between groups.
Conclusions:
- Pre-operative clopidogrel significantly increases bleeding complications and re-exploration rates in urgent CABG.
- Routine use of bilateral ITAs is feasible in patients exposed to clopidogrel, with manageable bleeding risks.
Background:
Clopidogrel application before diagnostic or therapeutical percutaneous coronary intervention has become the standard for stent thrombosis prevention. Irreversible platelet inhibition causes increasing bleeding complications if urgent coronary artery bypass grafting is necessary. This study evaluates the effect on bleeding complications of clopidogrel in urgent CABG using bilateral internal thoracic artery (ITA) and saphenous veins in all patients.
Methods:
We retrospectively analyzed 128 patients (operated between January 2000 and September 2002) undergoing urgent or emergent CABG using both ITAs, and compared 64 patients with previous clopidogrel and aspirin application (within 5 days) to 64 patients without clopidogrel. We evaluated chest tube output, re-exploration rate and necessity of blood products, ventilation time and ICU stay.
Results:
Both groups were comparable in age, gender, number of performed anastomoses (mean 4/patient). Chest tube output (24 h) was higher in the clopidogrel group at 977+/-628 ml vs. 788+/-389 ml (p=0.046), as was re-exploration rate with 7.81% (5 of 64) vs. 0% (0 of 64) (p<0.005). The number of blood products amounted to 2.7+/-1.9 U in the clopidogrel group vs. 1.9+/-1.6 U (p=0.013) for red cells, 0.05+/-0.9 U vs. 0.03+/-0.25 (p=0.0003) for platelets, and 0.5+/-1.3 U vs. 0.2+/-1.0 U (p=0.14) for fresh frozen plasma. Mechanical ventilation time was 11.9+/-9.7 h vs. 9.6+/-5.9 h (p=0.10), ICU stay 32.6+/-22.1 h vs. 27.8+/-18.2 h (p=0.19).
Conclusions:
Previous application of clopidogrel in combination with aspirin before urgent CABG induces increased chest tube output, re-exploration rate and necessity of blood products, especially platelets. Nevertheless, routine use of both ITAs in patients after clopidogrel exposure can be performed with acceptable bleeding complications.
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