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London, UK – 30 Aug 2015: Ezetimibe reduces cardiovascular events in patients with diabetes and a recent acute coronary syndrome, according to a subgroup analysis of the IMPROVE-IT trial presented at ESC Congress today by co-principal investigator Dr Robert Giugliano, physician in cardiovascular medicine at Brigham and Women's Hospital in Boston, US.1 Ezetimibe achieved greater reductions in LDL cholesterol than statins alone, resulting in lower risks of cardiovascular events in patients with diabetes. The benefits observed in diabetics were greater than in those without diabetes.
EMBARGO : 30 August 2015 at 14:15 BST
“Acute coronary syndromes, including myocardial infarction (heart attack) and unstable angina (threatened heart attack), are a leading cause of death and disability worldwide,” said Dr Giugliano. “In addition to lifestyle changes, medications to lower blood cholesterol are helpful to prevent future cardiac and vascular events such as myocardial infarction and stroke. Statins are recommended for patients with and without diabetes, but the benefit of adding a non-statin has been less clear.”Improved Reduction of Outcomes: Vytorin Efficacy International Trial (IMPROVE-IT) is the largest and longest study with ezetimibe. The six year trial included 18 144 patients who had been hospitalised with an acute coronary syndrome within the previous ten days, were not being treated with ezetimibe or the highest dose of potent statins, and who had an LDL cholesterol between 1.3 and 3.2 mmol/L (50-125 mg/dL). Patients were randomised to ezetimibe (10 mg) or placebo. All patients received 40 mg simvastatin, which was increased to 80 mg if LDL cholesterol on treatment was greater than 2.04 mmol/L (79 mg/dL).Patients were followed for a median of six years for the primary composite of cardiovascular death, myocardial infarction (MI), hospitalisation for unstable angina, coronary revascularization ≥30 days, and stroke. The main finding of the trial was that ezetimibe significantly reduced the chances of a future major cardiac or vascular event by 6.4% compared to placebo, with no increase in adverse safety events.2The analysis presented today provides the outcomes in the 4 933 (27%) patients with diabetes, one of the prespecified subgroups. The investigators found that in diabetics, ezetimibe added to a statin lowered LDL cholesterol at 1 year by 1.1 mmol/L (43 mg/dL) compared with 0.6 mmol/L (23 mg/dL) with a statin alone. Diabetics receiving ezetimibe had a 14% relative risk reduction (5.5% absolute reduction; number needed to treat [NNT] = 18) over placebo for the primary composite endpoint (hazard ratio [HR] = 0.86; 95% confidence interval [CI] = 0.78-0.94) compared with a 2% relative reduction for non-diabetics (HR = 0.98; 95% CI = 0.91-1.04).“The non-statin, cholesterol-lowering drug ezetimibe, when added to background therapy with a statin, was particularly effective in patients with diabetes who had been admitted to the hospital with an acute coronary syndrome,” said Dr Giugliano. “Ezetimibe is an oral drug taken once daily that reduces LDL (or ‘bad’) cholesterol) by blocking cholesterol absorption in the gut. This is a different action than that of statins, which block cholesterol production in the liver and have been shown to be highly effective in preventing cardiac and vascular events in a wide variety of patients.”In diabetics, the greatest reductions in cardiovascular events were in ischaemic stroke (39%), myocardial infarction (24%), and the composite of death due to cardiovascular causes, myocardial infarction, or stroke (20%). In diabetics and non-diabetics, there were no differences between ezetimibe and placebo in safety outcomes including liver test abnormalities, muscle side effects, gall bladder related events and cancer.Dr Giugliano concluded: “Our results are particularly good news for patients with diabetes who have coronary artery disease. We found that in diabetics with recent acute coronary syndrome, ezetimibe added to simvastatin reduced LDL cholesterol by (0.5 mmol/L) (20 mg/dL) more than simvastatin alone and achieved an average LDL cholesterol of 1.4 mmol/L (54 mg/dL). This greater reduction resulted in lower risks of future cardiovascular events relative to placebo.”ENDS
1Dr Giugliano will present the abstract ‘Benefit of Adding Ezetimibe to Statin Therapy on Cardiovascular Outcomes and Safety in Patients With vs Without Diabetes: the IMPROVE-IT Trial’ at 14:15 during:• Clinical Trial Update 1 - Cardiovascular diseases: prevention, outcomes, quality on Sunday 30 August at 14:00 in Hyde Park (The Hub) 2Cannon CP, Blazing MA, Giugliano RP, et al. Ezetimibe added to statin therapy after acute coronary syndromes. NEJM. 2015;372:2387-2397.
SOURCES OF FUNDING: This research was supported by Merck & Co. DISCLOSURES: Robert Giugliano’s disclosures in the past 36 months are: clinical trials/research support: Amgen, Daiichi-Sankyo, Merck; honoraria for CME lectures: Amgen, Daiichi-Sankyo, Merck; consultant: Amarin, American College of Cardiology, Amgen, CVS Caremark, Daiichi-Sankyo, GlaxoSmithKline, Merck, Pfizer, Regeneron, Sanofi-Aventis.
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About the European Society of CardiologyThe European Society of Cardiology (ESC) represents more than 90 000 cardiology professionals across Europe and worldwide. Its mission is to reduce the burden of cardiovascular disease in Europe. About ESC Congress 2015ESC Congress is the world’s largest and most influential cardiovascular event contributing to global awareness of the latest clinical trials and breakthrough discoveries. ESC Congress 2015 takes place 29 August to 2 September at ExCel London in London, UK. Access the scientific programme. More information is available from the ESC Press Office at firstname.lastname@example.org.To access all the scientific resources from the sessions during the congress, visit ESC Congress 365. This press release accompanies both a presentation and an ESC press conference at the ESC Congress 2015. Edited by the ESC from material supplied by the investigators themselves, this press release does not necessarily reflect the opinion of the European Society of Cardiology. The content of the press release has been approved by the presenter.
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