Custodiol Versus Blood Cardioplegaia in Paediatric Cardiac Surgery

After cross clamping patient will receive single dose of HTK custodiol cardioplegia. at temperature of 4-8°C and will be perfused for 6-8 minutes. Dose will start from 400 up to 1000 ml according to the child's body weight. Perfusion pressure will be kept at 70 - 80 mmHg until the heart is arrested.

After cross clamping patient will receive blood cardioplegia, delivered by microplegia delivery system by adding potassium to the blood (K= 35 ml eq/L) . The initial dose will be 35ml/ kg, and subsequent doses 20-15 ml/kg given every 20 minutes at a Temperature of 10 - 15 °C, while maintaining a perfusion pressure of 100-125 mmHg.