Results: Base on our data, the efficacys of warm blood cardioplegia were better crystalloid cardioplegia. The lactate concentration in coronary sinus was significantly lower after warm blood than crytalloid cardioplegia (6.3 mmol / L vs 8.7 mmol / L, p<0.001), and troponin I release also significantly differrent between groups (2.9 ng / ml vs 3.7 ng / ml, p = 0, 014).