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Abstract Title:

Prevention of sudden cardiac death with omega-3 fatty acids in patients with coronary heart disease: a meta-analysis of randomized controlled trials.

Abstract Source:

Ann Med. 2009;41(4):301-10. PMID: 19148838

Abstract Author(s):

Yun-Tao Zhao, Qiang Chen, Ya-Xun Sun, Xue-Bin Li, Ping Zhang, Yuan Xu, Ji-Hong Guo

Article Affiliation:

Department of Cardiology, Peking University People's Hospital, No. 11 Xizhimen South Street, Beijing, China.

Abstract:

AIM: To systematically review trials concerning the effects of omega-3 fatty acids on sudden cardiac death (SCD), cardiac death, and all-cause mortality in coronary heart disease (CHD) patients.

METHODS: PubMed, Embase, and the Cochrane database (1966-2007) were searched. We identified randomized controlled trials that compared dietary or supplementary intake of omega-3 fatty acids with control diet or placebo in CHD patients. Eligible studies had at least 6 months of follow-up data, and cited SCD as an end-point. Two reviewers independently assessed methodological quality. Meta-analysis of relative risk was carried out using the random effect model.

RESULTS: Eight trials were identified, comprising 20,997 patients. In patients with prior myocardial infarction (MI), omega-3 fatty acids reduced relative risk (RR) of SCD (RR = 0.43; 95% CI: 0.20-0.91). In patients with angina, omega-3 fatty acids increased RR of SCD (RR = 1.39; 95% CI: 1.01-1.92). Overall, RR for cardiac death and all-cause mortality were 0.71 (95% CI: 0.50-1.00) and 0.77 (95% CI: 0.58-1.01), respectively.

CONCLUSIONS: Dietary supplementation with omega-3 fatty acids reduces the incidence of sudden cardiac death in patients with MI, but may have adverse effects in angina patients.

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Sayer Ji
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