Aim. The aim of our study was to assess the 5-year prognostic significance of contrast-induced acute kidney injury (CI-AKI) in patients with chronic coronary artery disease (CAD). Materials and methods. 561 patients with stable CAD and indications for procedures with intraarterial contrast media administration were included in prospective open cohort study (ClinicalTrials.gov ID NCT04014153). CI-AKI was defined as the 25% rise (or 0.5 mg/dl) of serum creatinine from baseline assessed 48 hours after administration of contrast media. The primary endpoint was CI-AKI according to KDIGO criteria. The secondary endpoints were total mortality, cardiovascular mortality, myocardial infarction, stroke, gastrointestinal bleeding, acute decompensation of heart failure, coronary artery bypass grafting, repeat percutaneous coronary intervention. Most of the patients, included in the study, were males aged 59.3±11.2 years with arterial hypertension and overweight (BMI 28.8±4.6 kg/m2). Results. CI-AKI was diagnosed in 104 (18.5%) patients. The rate of CI-AKI using the absolute creatinine rise definition was 17 cases (3%). The logistic regression model including age, weight, BMI, female gender, heart failure, proteinuria, arterial hypertension, anemia and baseline serum creatinine, was created. Age, female gender, heart failure, proteinuria and baseline creatinine were statistically significant (p<0.05) risk factors in the model obtained. During 5-year follow-up period CI-AKI seemed to increased the risk of acute decompensation of heart failure and stroke. Conclusion. Elderly female patients suffering from heart failure, proteinuria with higher levels of serum creatinine need more attention and preventive measures before contrast media administration. CI-AKI may indirectly lead to the increased risk of acute decompensation of heart failure and stroke, according to our single-center prospective study. Key words: contrast-induced acute kidney injury, contrast-induced nephropathy, contrast-associated acute kidney injury, coronary artery disease, percutaneous coronary intervention, contrast, prognosis, mortality. For citation: Mironova O.Iu., Fomin V.V. Prognostic significance of contrast-induced acute kidney injury in chronic coronary artery disease patients. Consilium Medicum. 2020; 22 (5): 73-76. DOI: 10.26442/20751753.2020.5.200218