Statin therapy is associated with superior clinical outcomes after endovascular treatment of critical limb ischemia

Abstract

The aim of this study was to determine if statin therapy improves clinical outcomes after endovascular intervention in patients with critical limb ischemia (CLI). A retrospective review of all patients undergoing endovascular treatment for CLI was performed. Two groups were created according to whether they were receiving statin therapy at the time of intervention. Demographics, lesion morphology, overall mortality, primary and secondary patency, and limb salvage were compared between these groups. Analysis was performed using multivariate regression and Kaplan-Meier analysis. Between 2004 and 2009, 646 patients, 319 receiving statin therapy and 327 without, underwent an endovascular intervention for CLI. The statin group had significantly higher rates of diabetes mellitus, coronary artery disease, congestive heart failure, previous myocardial infarction, and coronary artery bypass grafting (P < .05). The two groups had similar lesion length, location, lesion type, TransAtlantic Inter-Society Consensus (TASC) classification, and primary procedure. At 24 months, the statin-treated group had higher rates of primary patency (43% vs 33%; P = .007), secondary patency (66% vs 51%; P = .001), limb salvage (83% vs 62%; P = .001), and overall survival (77% vs 62%; P = .038). Statin therapy was also independently associated with improved limb salvage by multivariate regression analysis (hazard ratio, 2.55; P < .001). Patients who were receiving statin therapy when they underwent interventions to treat CLI had significantly improved overall survival, primary and secondary patency, and limb salvage rates. Our findings suggest that statins should be part of the periprocedural treatment regimen and support further investigation into the beneficial effects of statins in patients undergoing endovascular treatment of CLI.