Hyperuricemia as a risk factor of contrast-induced acute kidney injury

Aim. To assess the prevalence of contrast-induced acute kidney injury (CI-AKI) in patients with stable coronary artery disease (CAD) and hyperuricemia. Materials and methods. Patients with stable CAD receiving optimal medical therapy and with indications to coronary angiography and possible coronary angioplasty were included in an observational open prospective cohort study. The protocol of the study was registered in clinicaltrials.gov with ID NCT04014153. We conducted a sub-analysis of the group of patients with hyperuricemia (uric acid level >7 mg/dl). Results. We included 1023 patients with stable CAD. 32 patients suffered from hyperuricemia. The rate of CI-AKI in this group was 6.25% (2 patients), that was lower than in patients with normal levels of uric acid (13.1%). The difference was not statistically significant probably due to the small number of patients with hyperuricemia. The patients with hyperuricemia had proteinuria 3 times more frequently, than patients without, the rate of diabetes mellitus was 7% higher as well as anemia by 4.5% but didn’t reach statistical significance. Conclusion. The rate of CI-AKI in patients with hyperuricemia was twice lower than in patients with normal levels of uric acid. More research needs to be conducted in patients with metabolic syndrome in larger groups.

contrast-induced acute kidney injury, contrast-associated acute kidney injury, contrast-induced nephropathy, coronary artery disease, percutaneous coronary intervention, contrast, hyperuricemia