Anesthetic induction with sevoflurane by mask 3-8% and fresh gas flow 2-8 l/min (FiO2 50-100%) followed by ketamine 1-2 mg/kg, midazolam 0,1-0,5 mg/kg, fentanyl 2-4 mcg/kg and pancuronium 0,1 mg/kg.

After orotracheal intubation, anesthesia is maintained with fentanyl 10 - 30 mcg/kg according to clinical needs and sevoflurane 1-3% (end-tidal concentration) before and after cardiopulmonary bypass. Specifically during cardiopulmonary bypass extra fentanyl 1-5 mcg/kg and pancuronium 0,1 mg/kg will be administered and the sevoflurane sustained 1-3% in a specific sevoflurane vaporizer included in the CPB machine.

Pressure-controlled ventilation will be applied to both groups objectifying normocarbia and normoxia.

Ringer's lactate (RL) will be used as crystalloid solution for fluid therapy.

Anesthetic induction with ketamine 1-3 mg/kg, midazolam 0,1-0,5 mg/kg, fentanyl 2-4 mcg/kg and pancuronium 0,1 mg/kg after preoxygenation with FiO2 between 50-100% and fresh gas flow 4-8 l/min.

After orotracheal intubation, anesthesia is maintained with fentanyl 10 - 30 mcg/kg according to clinical needs and continuous infusion of midazolam and ketamine 0,2-0,8 mg/kg/h and 1-2 mg/kg/h respectively before and after cardiopulmonary bypass. Specifically during cardiopulmonary bypass extra fentanyl 1-5 mcg/kg, midazolam 0,1-0,5 mg/kg and pancuronium 0,1 mg/kg will be administered.

Pressure-controlled ventilation will be applied to both groups objectifying normocarbia and normoxia.

Ringer's lactate (RL) will be used as crystalloid solution for fluid therapy.

Use of sevoflurane (compared to total intravenous anesthesia) in congenital heart deffects surgeries.

Dosage of serum troponin I during the first 72 hours after surgery

Dosage of serum CKMB, CPK and BNP during the first 72 hours after surgery