data were analyzed for the group as a whole and after stratification for the presence of acute renal failure ( arf ) defined by an increase in cr greater than 0.5 mg/dl and/or fena greater than 2 % and of renal hypoperfusion which was considered in case of hypotension resistant to volume repletion and/or dopamine infusion and of oliguria ( less than 1.0 ml/kg/h ) .
C0020649
hypotension
C0013030
dopamine