Hepatic function: Daily measurements of serum hepatic enzymes levels. Cardiac function: Monitoring of cardiac enzymes levels; need and magnitude of required inotrope treatment; occurrence of low cardiac output syndrome (defined as systolic blood pressure of 90 mmHg or less coupled with central venous pressure (CVP) of 15 mmHg or more) and incidence of cardiac arrhythmias. Transthoracic echocardiography examination will be performed on postoperative day 5 and assessed by an independent cardiologist.