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British Journal of Anaesthesia, 2002, Vol. 89, No. 2 242-246
© 2002 The Board of Management and Trustees of the British Journal of Anaesthesia

Clinical Investigations

Propofol attenuates myocardial lipid peroxidation during coronary artery bypass grafting surgery{dagger}

M. M. Sayin*,1, O. Özatamer1, R. Tasöz2, K. Kilinç3 and N. Ünal1

1 Department of Anaesthesiology and Intensive Care, 2 Department of Cardiovascular and Thoracic Surgery, Ankara University Faculty of Medicine and 3 Department of Biochemistry, Hacettepe University Faculty of Medicine, Ankara, Turkey*Corresponding author

{dagger}Presented at the Annual Congress of European Society of Anaesthesiologists, April 1998.

Background. Propofol can scavenge free radicals because it has a chemical structure similar to antioxidants.

Methods. We examined if free radical scavenging occurs with propofol during CABG operations. We studied 24 patients undergoing CABG surgery for triple vessel disease, randomized into two groups. After induction of anaesthesia with fentanyl 10 µg kg–1 and midazolam 0.1 mg kg–1, patients in the fentanyl group (n=14) received fentanyl infusion 10–30 µg kg–1 h–1 and patients in the propofol group (n=10) received propofol infusion 3–6 mg kg–1 h–1 for maintenance of anaesthesia. Atrial tissue biopsies were taken during cannulation for bypass, 45 min after cross-clamp insertion, 5 min after unclamping, and in the decannulation period. Lipid peroxidation was assessed by measurement of thiobarbituric acid reactive substances (TBARS) in the atrial tissue samples.

Results. Lipid peroxidation in the propofol group was less than in the fentanyl group (P<0.05) in all sampling periods. Lipid peroxidation in the fentanyl group increased significantly during cardiopulmonary bypass (CPB) (P<0.05), but no increase was found in the propofol group (P>0.05).

Conclusion. In clinical doses, propofol strongly attenuates lipid peroxidation during CABG surgery.

Br J Anaesth 2002; 89: 242–6


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