Potassium disorder, hypokalemia in the hypothermic phase (serum potassium T0 3.7 ± 0.8 vs serum potassium T351 3.5 ± 0.7; p = 0.011), hyperkalemia during the warming phase (serum potassium T2 3, 8 ± 0.7 compared to serum potassium T352 4.2 ± 0.8; p = 0.007).