Contrast-associated acute kidney injury after percutaneous coronary interventions in patients with acute coronary syndrome: a real-world study

Aim. To study the incidence of contrast-associated acute kidney injury (CA-AKI) in patients with various forms of the acute coronary syndrome (ACS). 
Materials and methods. An observational, open, single-center, prospective study included 83 patients with ACS with indications for percutaneous coronary intervention. Of these, 40 were included in the ST-segment elevation ACS group, and 43 patients were included in the non-ST-segment elevation ACS group. The study is registered at ClinicalTrials.gov as NCT04163484. Before the intervention, all patients had a general examination, ECG, complete blood count, blood chemistry, and blood coagulation tests. Later, 24 and 48 hours after the intervention, the serum creatinine (SC) trend was assessed. The primary endpoint was the development of in-hospital CA-AKI according to KDIGO criteria within 72 h or before hospital discharge. 
Results. An increase in SC level by 25% from the baseline was observed in 6 patients in each subgroup of ACS. A marked increase in SC by 50% and a decrease in glomerular filtration rate were reported only in 2 patients (one in each subgroup of ACS). 
Conclusion. The study showed that the incidence of CA-AKI in patients with ACS with ST-segment elevation was 2.3%, and in the group of patients with ACS without ST-segment elevation 2.5%.