evidence: Morphine-induced postconditioning reduced postoperative peak cTnI release as compared to the control group (0.57 ± 0.15 versus 0.75 ± 0.20 ng/mL, p<0.0001).
intervention: morphine (0.1 mg/kg) injected via a cardioplegia needle into the aortic root
comparator: control group (the same protocol was performed as in the postconditioning group except that patients received the same volume of saline instead
outcome: peak inotropic score ; duration of mechanical ventilation as well as ICU stay