IL-6 levels were elevated in TOF versus healthy infants and preoperatively were higher in TOF versus VSD/AVC.IL-10 levels were lower in TOF versus VSD/AVC preoperatively and during CPB.CRP levels were lower in TOF versus VSD/AVC 24 hours after CPB.PCT levels were elevated after CPB in TOF versus VSD/AVC. Here, IL10 is linked to ventricular septal defect.