Prophylactic atorvastatin prior to intra-arterial administration of iodinated contrast media for prevention of contrast-induced acute kidney injury: A meta-analysis of randomized trial data

Background: The efficacy of high-dose atorvastatin pretreatment in reducing the incidence of contrast-induced nephropathy in patients undergoing coronary angiography (CAG) or percutaneous coronary intervention (PCI) has been examined in some randomized studies. However, the results across the trials remain controversial. Objective: This study sought to perform a meta-analysis to evaluate the effect of high-dose atorvastatin in the prevention of contrastinduced nephropathy (CIN) while undergoing CAG or PCI. Materials and methods: Comprehensive literature searches for randomized controlled trials (RCTs) comparing high-dose atorvastatin vs. low-dose statin or placebo pretreatment for prevention of contrast-induced acute kidney injury in patients undergoing CAG were performed using PubMed, Embase, and the Cochrane library updated to June 2017. The primary outcome was the incidence of CIN. Results: A total of 11 RCTs were included in this analysis. The high-dose atorvastatin treatment can significantly reduce the incidence of CIN (OR 0.46, 95% CI 0.35 - 0.62, p < 0.00001). The benefit was consistent in comparison with the low-dose group (OR 0.41, 95% CI 0.25 - 0.66, p = 0.0003) and the placebo group (OR 0.50, 95% CI 0.26 - 0.98. p = 0.04). Conclusion: Our study demonstrates that high-dose statin pretreatment shows a benefit specifically in reducing the incidence of contrast-induced acute kidney injury in patients undergoing CAG, especially compared with low-dose statin pretreatment.