PrevenTion of Contrast-inducEd nephroAThy With urinE Alkalinization

patients will start hydration with isotonic saline 6 hours before angiography and continue for 12 hours after the procedure.

patients will start hydration with isotonic saline 6 hours before angiography and continue for 12 hours after the procedure. The patient receives solution of 1.4% sodium bicarbonate (167 mEq/L; 334 mOsm/L) one hours and six hours after procedure.

patients will start hydration with isotonic saline 6 hours before angiography and continue for 12 hours after the procedure. One hour before the angiography and 3 hours after patients will receive oral sodium bicarbonate at the dose of 4 g (47.6 mEq) dissolved in 60 mL of water