Nephrotoxicity of Iopamidol Versus Iodixanol in High-Risk Patients

To compare the incidence of contrast-induced nephropathy (CIN)(an absolute SCr increase 0.5 mg/dL from baseline) following the administration of iopamidol-370 (Iopamiro-370) and iodixanol-320 (Visipaque 320) in patients with chronic kidney disease (serum creatinine level more than 1.5 mg/dL for men and more than 1.3 mg/dL for women or preprocedural estimated glomerular filtration rate(eGFR):15-60 mL/min/1.73 m2) undergoing coronary angiography.