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Patterns of use of angiotensin-converting enzyme inhibitors/angiotensin receptor blockers among patients with acute myocardial infarction in China from 2001 to 2011: China PEACE-Retrospective AMI Study Randomized trial of complete versus lesion-only revascularization in patients undergoing primary percutaneous coronary intervention for STEMI and multivessel disease: the CvLPRIT trial Heart rate, pulse pressure and mortality in patients with myocardial infarction complicated by heart failure Acute Noncardiac Organ Failure in Acute Myocardial Infarction With Cardiogenic Shock Myocardial infarction with non-obstructive coronary arteries as compared with myocardial infarction and obstructive coronary disease: outcomes in a Medicare population Oxidative Stress and Cardiovascular Risk: Obesity, Diabetes, Smoking, and Pollution: Part 3 of a 3-Part Series Association of the PHACTR1/EDN1 Genetic Locus With Spontaneous Coronary Artery Dissection BMI, Infarct Size, and Clinical Outcomes Following Primary PCI Patient-Level Analysis From 6 Randomized Trials Comparison of Inhospital Mortality and Frequency of Coronary Angiography on Weekend Versus Weekday Admissions in Patients With Non-ST-Segment Elevation Acute Myocardial Infarction Long-Term Incremental Prognostic Value of Cardiovascular Magnetic Resonance After ST-Segment Elevation Myocardial Infarction A Study of the Collaborative Registry on CMR in STEMI

Clinical Trial2017 Dec 1;2(12):1385-1391.

JOURNAL:JAMA Cardiol. Article Link

Clinical Efficacy and Safety of Evolocumab in High-Risk Patients Receiving a Statin: Secondary Analysis of Patients With Low LDL Cholesterol Levels and in Those Already Receiving a Maximal-Potency Statin in a Randomized Clinical Trial

Giugliano RP, Keech A, Murphy SA et al. Keywords: statin; LDL-C; PCSK9 inhibition; stable atherosclerotic cardiovascular disease

ABSTRACT


IMPORTANCE - Current guidelines for atherosclerotic cardiovascular disease focus on high-intensity statins and targeting or using a threshold low-density lipoprotein cholesterol (LDL-C) level of less than 70 mg/dL for the highest-risk patients. Whether further reduction of LDL-C beyond these boundaries would be beneficial is unknown.


OBJECTIVE - To compare outcomes of evolocumab vs placebo in patients with stable atherosclerotic cardiovascular disease and a baseline LDL-C of less than 70 mg/dL and in those receiving background treatment with a maximal-potency statin.

DESIGN, SETTING, AND PARTICIPANTS - This secondary ad hoc analysis of the Further Cardiovascular Outcomes Research With PCSK9 Inhibition in Subjects With Elevated Risk (FOURIER) trial compared randomized treatments in 2 subgroups of patients with stable atherosclerotic cardiovascular disease currently receiving statin. Patients were classified by a baseline LDL-C of less than 70 or at least 70 mg/dL and by statin intensity (maximal: atorvastatin calcium, 80 mg/d, or rosuvastatin, 40 mg/d; submaximal: all other dosages). Patients with baseline LDL of less than 70 mg/dL either had a final screening LDL-C of at least 70 mg/dL or a final screening non-high-density lipoprotein cholesterol level of at least 100 mg/dL. Data were retrieved from 2013 to 2016 and analyzed in 2017 based on intention to treat.

MAIN OUTCOMES AND MEASURES - The primary efficacy endpoint was the composite of cardiovascular death, myocardial infarction, stroke, hospitalization for unstable angina, or coronary revascularization. The secondary efficacy endpoint was the composite of cardiovascular death, myocardial infarction, or stroke. Safety outcomes included adverse events and events of interest identified in the FOURIER trial. Interaction testing was used to assess the consistency of results in patients who did vs did not satisfy the above criteria.

RESULTS - A total of 27 564 patients (75.4% men and 24.6% women; mean [SD] age, 62.5 [9.0] years) were included in the analysis. Of 2034 patients (7.4%) who had a baseline LDL-C of less than 70 mg/dL, evolocumab reduced the risk for the primary endpoint (hazard ratio [HR], 0.80; 95% CI, 0.60-1.07) to a similar degree as in the 25 529 patients who had baseline LDL-C of at least 70 mg/dL (HR 0.86; 95% CI, 0.79-0.92; P = .65 for interaction; 1 patient was missing baseline LDL-C data). Of 7533 patients (27.3%) receiving maximal-potency statins, evolocumab significantly reduced the primary endpoint (HR, 0.86; 95% CI, 0.75-0.98) to a similar degree as in the 20 031 patients not receiving a maximal-potency statin (HR, 0.85; 95% CI, 0.78-0.93; P = .88 for interaction). The key secondary endpoint was reduced to a similar degree in both analyses. No major safety concerns were identified.

CONCLUSIONS AND RELEVANCE Evolocumab was equally effective in reducing cardiovascular events in patients with stable atherosclerotic cardiovascular disease regardless of whether the baseline LDL-C was less than 70 or at least 70 mg/dL and whether the background statin was of maximal or submaximal potency.