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Eur J Cardiothorac Surg 2000;17:723-728
© 2000 Elsevier Science NL

Expression of adhesion molecules and cytokines after coronary artery bypass grafting during normothermic and hypothermic cardiac arrest

^a Clinic of Cardiovascular Surgery, University Hospital, Rämistrasse 100, 8091 Zürich, Switzerland
^b Department of Biostatistics, University Hospital, Zürich, Switzerland
^c Division of Cardiac Anesthesia, University Hospital, Zürich, Switzerland
^d Division of Clinical Chemistry, University Hospital, Zürich, Switzerland

Corresponding author. Tel.: +41-1-255-3801; fax: +41-1-255-4369
e-mail: gregor.zund{at}chi.usz.ch

Objective: Cardiac surgery with cardiopulmonary bypass (CPB) results in vascular injury and tissue damage which involves leukocyte-endothelial interactions mediated by cytokines and adhesion molecules. This study was designed to demonstrate the effect of normothermic and hypothermic CPB to cytokine and soluble adhesion molecule levels in adults and to determine whether these levels correlate to the patients postoperative course. Design and patients: In 25 patients after normothermic and in 25 patients after hypothermic coronary artery bypass grafting with cardiopulmonary bypass (CPB), blood samples for cytokine and soluble adhesion molecule analysis were taken preoperatively, 24, 36, 48 h, and 6 days postoperatively. Soluble adhesion molecules (sE-selectin, sICAM-1) were measured by ELISA and cytokines (TNF-, IL-6, IL-8) by chemilumenscent-immunoassay. Clinical data were collected prospectively. Results: Postoperatively, adhesion molecule and cytokine levels were significantly elevated after CPB. Mean plasma levels of sICAM-1 was 2.4-fold higher after 6 days. Mean plasma concentration of sE-selectin peaked after 48 h with a 2-fold increase compared to normothermic conditions. In the hypothermia group sICAM-1, sE-selectin, IL-6, and IL-8 showed significantly higher levels (P<0.0057, P<0.0012, P<0.0419, P<0.0145) after 24 h compared to the normothermia group. No clinical differences were seen. Conclusion: Adhesion molecules and cytokines are elevated after CPB. Patients after hypothermic CPB show significant higher sICAM-1, sE-selectin, IL-6, and IL-8 levels after 24 h compared to normothermic conditions. These results are mainly due to longer CPB and crossclamp times but do not alter the patient's postoperative course.

Key Words: Cardiac surgery • Ischemia/reperfusion • Adhesion molecules • Cytokines

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