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European Journal of Cardio-Thoracic Surgery, Vol 9, 22-29, Copyright © 1995 by European Association for Cardio-thoracic Surgery

ARTICLES

Arterial and venous cytokine response to cardiopulmonary bypass for low risk CABG and relation to hemodynamics

MC Deng, M Wiedner, M Erren, T Mollhoff, G Assmann and HH Scheld
Department of Thoracic and Cardiovascular Surgery, Westfalian Wilhelms- University, Munster, Germany.

During and after cardiopulmonary bypass (CPB), cytokines may affect cardiac performance and the immune response and are therefore of diagnostic and therapeutic interest. We have used EIA/EASIA kits to measure arterial and venous levels of interleukin-1-beta (IL-1-beta), IL-2, IL-2 receptor (IL-2-R), IL-6, tumor necrosis factor (TNF)-alpha and interferon (IFN)-gamma in 12 men and 3 women (mean age 59.4 +/- 8.5 years, mean left ventricular ejection fraction 66 +/- 11%, average of 2.5 +/- 0.64 vessels affected by disease) undergoing elective coronary artery bypass grafting (CABG). On average each patient received 3 +/- 0.85 bypass grafts and required a postoperative maximum dopamine-dose of 3.8 micrograms/kg per min. Mean CPB and operation times were 60 +/- 21 min, and 132 +/- 16 min, respectively. During CPB, the venous levels of IL-2 temporarily decreased from 234 to 0 (p < 0.05) pg/ml and arterial and venous levels of IL-2-R temporarily decreased from 28 to 16, and 36 to 18 pM (p < 0.05), respectively. After termination of CPB, there was an increase in the arterial and venous levels of IL-6 from below 3 to 253 and 277 pg/ml (p < 0.05) and TNF-alpha from 1.1 to 5.7 and 0.7 to 4.0 pg/ml, respectively (p < 0.05). Tumor necrosis factor- alpha-increases peaked 30 min, and IL-6 increases peaked 4 h after termination of CPB. Twenty-four hours after the end of CPB, IL-6 showed a tendency to return to baseline, but still remained significantly elevated.(ABSTRACT TRUNCATED AT 250 WORDS)

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