Effectiveness of hospital lipid-lowering protocol of intensive lipid-lowering therapy for patients with acute coronary syndrome

Background and aims: The achievement of a target low-density lipoprotein cholesterol (LDL-C) level in clinical settings is often insufficient. A hospital lipid-lowering protocol (HLP) could be effective for providing the optimal lipid-lowering therapy. Herein we determined the effectiveness of a HLP for acute coronary syndrome (ACS) patients. Methods: We retrospectively analyzed 1,497 patients who underwent successful percutaneous coronary intervention for ACS at our hospital (November 2011 to May 2020). In December 2018, we introduced a HLP that included the prescription of the maximum tolerated dose of statin, ezetimibe, and eicosapentaenoic acid. We compared the lipid profile and clinical outcomes at 12 months between before (Control group: 1,219 patients) and after the HLP's introduction (HLP group: 278 patients). The primary outcome was the achievement rate of LDL-C < 1.8 mmol/L (70 mg/dL). The key secondary outcomes were the change value and ratio of LDL-C plus the major adverse cardiac events (MACE), defined as a composite of cardiac death, myocardial infarction, target vessel revascularization, and stent thrombosis. Results: The achievement rate of LDL-C < 1.8 mmol/L was significantly higher in the HLP group than in the Control group (58% vs. 27%, p < 0.01). The HLP group's change ratio and LDL-C values were significantly lower than those of the Control group ( -39.5 [ -55.1, -13.2]% vs. -20.4 [ -38.4, 0]%, p < 0.001; -41 [ -69, -11] mg/dL vs. -21 [ -38, 0] mg/dL, p < 0.001). MACE was similar between the groups (16.9 vs. 15.5%, p = 0.66). Conclusion: Implementing a HLP for ACS patients improved the achievement of target LDL-C at 12 months.