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Level of evidence A Data derived from multiple randomized clinical trials or meta-analyses Level of evidence B Data derived from a single randomized clinical trial or large non-randomized studies Level of evidence C Consensus of opinion of the experts and/ or small studies, retrospective studies, registries

MD; for the OMEGA Study GroupBackground-There is no randomized, double-blind trial testing the prognostic effect of highly purified omega-3 fatty acids in addition to current guideline-adjusted treatment of acute myocardial infarction. Methods and Results-OMEGA is a randomized, placebo-controlled, double-blind, multicenter trial testing the effects of omega-3-acid ethyl esters-90 (1 g/d for 1 year) on the rate of sudden cardiac death in survivors of acute myocardial infarction, if given in addition to current guideline-adjusted treatment. Secondary end points were total mortality and nonfatal clinical events. Patients (nϭ3851; female, 25.6%; mean age, 64.0 years) were randomized in 104 German centers 3 to 14 days after acute myocardial infarction from October 2003 until June 2007. Acute coronary angiography was performed in 93.8% and acute percutaneous coronary intervention in 77.8% of all patients. During a follow-up of 365 days, the event rates were (omega and control groups) as follows: sudden cardiac death, 1.5% and 1.5% (Pϭ0.84); total mortality, 4.6% and 3.7% (Pϭ0.18); major adverse cerebrovascular and cardiovascular events, 10.4% and 8.8% (Pϭ0.1); and revascularization in survivors, 27.6% and 29.1% (Pϭ0.34). Conclusions-Guideline-adjusted treatment of acute myocardial infarction results in a low rate of sudden cardiac death and other clinical events within 1 year of follow-up, which could not be shown to be further reduced by the application of omega-3 fatty acids. Clinical Trial Registration-URL: http://www.clinicaltrials.gov.

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The present results indicate that the benefit of cardiac rehabilitation therapy following acute coronary events is only partially maintained during the following year. Continuous strategies of medical care need to be developed to improve the long-term outcome in coronary patients.

Attendance to early, comprehensive short-term cardiac rehabilitation programmes on top of current guideline-adjusted treatment of acute myocardial infarction is associated with a significantly improved 1-year prognosis.