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Previous studies have reported that short-term statin loading effectively protects statin-naive patients with mild renal insufficiency from contrast-induced acute kidney injury (CI-AKI). The aim of the present study was to determine whether patients with more advanced chronic kidney disease (CKD) and long-term statin therapy also benefit from high-loading statin pretreatment. A total of 256 consecutive patients with moderate-to-severe CKD receiving long-term statin therapy and undergoing percutaneous coronary intervention (PCI) or coronary artery angiography (CAG) were divided into the statin-loading group (n=34) and the no statin-loading group (n=222), depending on whether the respective patient received high-dose statin within 24 h prior to the intervention. The primary endpoint was the percent change in serum creatinine (SCr) levels. Additional endpoints included absolute change in SCr levels, estimated glomerular filtration rate (eGFR) at 48-72 h after contrast exposure, incidence rate of CI-AKI and composite in-hospital adverse events. The mean SCr decreased from baseline in either of the two groups, and the differences in the percent (P=0.930) and absolute change (P=0.990) in SCr levels were not significant between the two groups. Furthermore, no significant difference in the post-procedural eGFR was observed between the two groups. The incidence rates of CI-AKI (2.9 vs. 4.1%, P&gt;0.999) and in-hospital adverse events (0.0 vs. 3.6%, P=0.602) were also similar between the two groups. Stratified analyses were then performed, which yielded results consistent with the above. Multiple linear regression indicated that the baseline eGFR value and current smoking status were independent factors affecting the post-procedural eGFR value, while high-dose statin loading was not. Therefore, statin reloading prior to intervention may not provide any further renal protection or decrease the occurrence of in-hospital adverse events in patients with moderate-to-severe CKD receiving long-term statin therapy, which warrants validation in prospective trials.

Renal impact of high‑loading‑dose statin pre‑cardiac catheterization in patients with chronic kidney disease and long‑term statin use