REduction of rIsk for Contrast Induced Nephropathy

This is a multicenter prospective observational study collecting data on over 5000 CAG patients admitted to department of cardiology in 12 hospitals from January 2013. Data will be collected for more than 1 year on all patients undergoing CAG with or without PCI older than 18 years without baseline end-stage renal failure needing renal replacement therapy or renal transplantation. Data to be collected includes demographic information, admission diagnoses and co-morbidities, biomarkers and details on preventive hydration and medications used Contrast-induced nephropathy (CIN) is the primary endpoint, defined as a ≥ 0.5 mg/dL or 25% increase in serum creatinine (SCr) from baseline during the first 48 to 72 hours after the procedure.