Effect of Hydroxyethylstarch 6% 130/0.4 Administration on Renal Function After Cardiac Surgery

Inclusion Criteria: * All patients undergoing cardiac surgery Exclusion Criteria: * Heart transplantation * Ventricular assist devices * Patients requiring extracorporeal life support before or after cardiac surgery * Patients revised for bleeding and/or tamponnade presenting with hemodynamic instability * Patients in whom the administered volume therapy was not completely available * Subjects who required renal replacement therapy before surgery * Trauma patients who were put on cardiopulmonary bypass * Patients who died intra-operatively or soon after arrival in the intensive care unit in whom no postoperative creatinine measurements were available