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The Journal of Cardiovascular Surgery 2008 December;49(6):801-8

Copyright © 2008 EDIZIONI MINERVA MEDICA

language: English

The systemic inflammatory response in coronary artery bypass grafting: what is the role of the very low ejection fraction (EF ≤30%)?

Karfis E. A. 1, 2, Papadopoulos G. 3, Matsagas M. 4, Pantazi D. 5, Lekka M. 5, Kitsiouli I. 5, Siminelakis S. 1, Anagnostopoulos C. 6, Drossos G. 2

1 Department of Cardiac and Thoracic Surgery University Hospital of Ioannina School of Medicine, Ioannina, Greece 2 Department of Cardiac and Thoracic Surgery G. Papanikolaou General Hospital, Thessaloniki, Greece 3 Department of Anesthesia University Hospital of Ioannina School of Medicine, Ioannina, Greece 4 Department of Surgery-Vascular Surgery Unit University Hospital of Ioannina School of Medicine, Ioannina, Greece 5 Institute of Biochemistry, Department of Chemistry University of Ioannina, Ioannina, Greece 6 College of Physicians and Surgeons of Columbia University, New York, NY, USA


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Aim. Patients with depressed left ventricular function are more susceptible to develop postoperative complications after cardiac surgery. The aim of the present study was to examine the effect of severe left ventricular dysfunction on the activation of systemic inflammatory reaction during and after coronary artery bypass grafting (CABG).
Methods. Clinical prospective study; 32 selected patients underwent CABG; 16 patients had depressed left ventricular function before the operation (low ejection fraction [EF] <30%) – Low EF group (study group). Sixteen patients had normal left ventricular function (normal EF, >50%) – Normal EF group (control group). The levels of inflammatory mediators TNF-a, IL-6, IL-8 and IL-10 were measured preoperatively, during and after cardiopulmonary bypass (CPB) and 24 hours postoperatively.
Results. Higher levels of almost all of inflammatory mediators were detected in patients with depressed left ventricular function compared with patients of normal EF group. IL-6 levels were found statistically significant higher in Low EF group before the induction of anesthesia (P=0.039) and after the administration of protamine (P=0.02). IL-8 levels were found statistically significant higher in Low EF group before the induction of anesthesia (P=0.05), 30 min after the start of CPB (P=0.02), after the administration of protamine (P=0.015) and 24 hours after the end of the operation (P=0.05). No statistically significant differences were demonstrated between the 2 groups of study relative to TNF-a and IL-10.
Conclusion. A greater activation of systemic inflammatory reaction occurred in patients with depressed left ventricular function than in patients with normal cardiac function when they underwent CABG with extracorporeal circulation.

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