First postoperative day serum creatinine ( Group A 1.29 + 0.395 , Group B 1.33 + 0.57 , P = .77 ) and postoperative ejection fraction percentage on the third postoperative day ( Group A 50.78 + 8.72 , Group B 50.57 + 8.38 , P = .92 ) showed no statistical difference between two groups .