Preventing Contrast Nephropathy With Sodium Bicarbonate in Patients With Pulmonary Edema,Heart Failure,Uncontrolled HTN

IV solution of NaCl 0.45% (Arm 1) or IV 75 cc of sodium bicarbonate 8.4% solved in 1 liter of NaCl 0.45% (Arm 2) . 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.