BACKGROUND: Cardiopulmonary bypass (CPB) has been associated with activation and injury of endothelial cells, probably responsible for the systemic inflammatory response syndrome (SIRS) taking place in these patients. METHODS: We measured plasma concentrations of soluble P-selectin (sP-s), E-selectin (sE-s), tetranectin (TN), vonWillebrand factor (vWF) levels, and angiotensin-converting enzyme (ACE) activity in 31 adult patients undergoing elective coronary artery bypass grafting, just before and up to three days after surgery, and in 25 healthy volunteers. RESULTS: Patients showed higher plasma sP-s and sE-s and ACE concentrations, just before surgery, but significantly lower TN levels, compared with controls. During the first three postoperative days (PD), the concentration of each of the molecules followed a different and independent pattern, although in the third PD, the levels of sP-s, sE-s and ACE were higher and those of vWF and TN lower, compared with the preoperative ones. However, patients had higher sP-s (P=0.06), sE-s (P=0.07), and vWF (P=0.005), but lower TN concentrations (P=0.02) on the third PD compared with controls. CONCLUSIONS: CPB is characterised by pronounced changes in plasma sP-s, sE-s, TN, vWF levels, and ACE activity, which are associated with significant alteration in the intra- and early postoperative endothelial function observed in open heart surgery.
BACKGROUND: Cardiopulmonary bypass (CPB) has been associated with activation and injury of endothelial cells, probably responsible for the systemic inflammatory response syndrome (SIRS) taking place in these patients. METHODS: We measured plasma concentrations of soluble P-selectin (sP-s), E-selectin (sE-s), tetranectin (TN), vonWillebrand factor (vWF) levels, and angiotensin-converting enzyme (ACE) activity in 31 adult patients undergoing elective coronary artery bypass grafting, just before and up to three days after surgery, and in 25 healthy volunteers. RESULTS:Patients showed higher plasma sP-s and sE-s and ACE concentrations, just before surgery, but significantly lower TN levels, compared with controls. During the first three postoperative days (PD), the concentration of each of the molecules followed a different and independent pattern, although in the third PD, the levels of sP-s, sE-s and ACE were higher and those of vWF and TN lower, compared with the preoperative ones. However, patients had higher sP-s (P=0.06), sE-s (P=0.07), and vWF (P=0.005), but lower TN concentrations (P=0.02) on the third PD compared with controls. CONCLUSIONS: CPB is characterised by pronounced changes in plasma sP-s, sE-s, TN, vWF levels, and ACE activity, which are associated with significant alteration in the intra- and early postoperative endothelial function observed in open heart surgery.
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