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Leucocyte-depleted cardioplegia does not reduce reperfusion injury in hypothermic coronary artery bypass surgery

P G Browning

Research Department The Cardiothoracic Centre NHS Trust, Liverpool, Pbrow{at}ccl-tr.nwest.nhs.uk

M Pullan

Department of Cardiac Surgery The Cardiothoracic Centre NHS Trust, Liverpool

M Jackson

Clinical Audit Department The Cardiothoracic Centre NHS Trust, Liverpool

A Rashid

Department of Cardiac Surgery, The Cardiothoracic Centre NHS Trust, Liverpool

This study investigated the effects of leucocyte-depleted cardioplegia on postreperfusion oxidative stress and myocardial injury in elective hypothermic coronary artery bypass surgery. Forty patients were randomized to receive either cardioplegia with leucocytes depleted by an in-line Pall BC1B filter, or blood cardioplegia without leucocyte depletion. Transmyocardial oxidative stress was assessed by oxidized glutathione measurements in samples taken simultaneously from the coronary sinus and aortic root, and myocardial injury by postoperative CKMB and troponin-T measurements. The BC1B filters reduced numbers of cardioplegia leucocytes by a mean of 90.7%. Both patient groups demonstrated significant increases (p < 0.001) in transcardiac oxidized glutathione gradients after crossclamp release. No significant differences were found between the groups for postreperfusion oxidized glutathione gradients, postoperative levels of CKMB or troponin-T, or in the frequency of perioperative and postoperative complications. These results suggest that leucocyte-depleted cardioplegia does not significantly improve myocardial protection in patients undergoing elective coronary artery bypass surgery.

Perfusion, Vol. 14, No. 5, 371-377 (1999)
DOI: 10.1177/026765919901400509
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