Results: 230 patients, male gender was 61.7%, median of age was 70, lowest age was 60, oldest age was 89, mean of tension<100 was 14.3%, heart failure ≥ NYHA III was 30%, diabetes mellituswas 13.5%, EF <40% was 17.8%, baseline serum creatinin >1, 5 mg% was 11.7%, baseline eGFR <40 ml / min/1.73 m2 was 71.3%, mean of contrast volume was 2.13 ± 0.95 ml / kg, Cigarroa quotient was 2.55 ± 2.31, the incidence of CIN was 7.4%, the incidence of CIN in percutaneous coronary angiogram group was 0.9%, the incidence of CIN in primary PCI group was 3%, and the incidence of CIN in elective PCI group was 3.5%.