 Contrast-induced nephropathy CIN is associated with increased morbidity and mortality after percutaneous coronary interventions PCI. Patients with ST elevation myocardial infarction STEMI are at high risk for CIN because of hemodynamic instability of the patient, inability to prevent the phenomenon hydration and the possible exposure to high volume of contrast media. Recent reports have shown incidence of CIN up to 19 in this population and a related increase of in-hospital mortality. 