Comparisons: IV 154 mEq/L solution of NaCl 0.9% OR IV 154 mEq/ L sodium bicarbonate solved in 154 mEq/ L NaCl 0.9%. Each fluid is infused at the rate of 3 ml/kg/ hour one hour before the angiographic procedure, continuing at the rate of 1 ml/kg/ hour for 6 hours after the procedure. Maximum rate of fluid permitted is that for a body weight of 110 Kg.