[Risk factors of contrast-induced nephropathy in patients with myocardial infarction]

To identify predictors of contrast-induced nephropathy (CIN) and evaluate its significance for the hospital prognosis of myocardial infarction with elevated ST segment.

722 (75.7%) of the total 954 patients underwent X ray examination with the use of contrast material (coronary angiography (CAG) and/or transcutaneous coronary intervention (TCI)) within 24 hr after the appearance of symptoms. In all cases, serum creatinine level was determined and glomerular filtration rate (GFR) calculated by the MDRD formula at admission, 2-3 days after CAG/TCI, and 10-14 days after hospitalization. CIN was defined as a more than 25% (44 mcmnol/l) rise in the creatinine level compared with the initial one within 48-72 hr after intravascular administration of contrast material in the absence of an alternative cause. The endpoints (adverse cardiovascular effects) were evaluated at the hospital stage of the study.

Significantly more patients with CIN (n=52; 7.2%) had the history ofdiabetes mellitus (DM) and chronic renal disease (CRD), clinically manifest Killip class II-IV acute cardiac failure (ACF), and reduced left ventricular ejection fraction (LVEF) compared with the patients having normal renal function. The risk of RAEF in the presence of CIN increased by 2.5 times (95% CI 1.26-5.05), that of MI by 5.4% (95% CI 2.69-10.64), life-threatening and other complications by 4.1% (95% CI 1.99-8.29) and 5.1% (95% CI times 2.85-9.17) times respectively. The presence of Killip class II-IV ACF increased the risk of CIN and DM by afactor of 2.2.

CIN was diagnosed in 7.2% of the patients with myocardial infarction and elevated ST segment; it is associated with the history of DM, CRD, pronounced Killip class II-IV ACF and decreased LVEF DM and clinically manifest ACF were independent predictors of CIN in patients with myocardial infarction and elevated ST segment.