Evidence for the Cardioprotective Effects of Omega-3 Fatty Acids

• Published in: Annals of Pharmacotherapy
• Main Authors: Carroll, Douglas N, Roth, Mary T
• Format: Article in Journal/Newspaper
• Language: English
• Published: SAGE Publications 2002
• Subjects: Pharmacology (medical); Greenland; eskimo*
• Online Access: http://dx.doi.org/10.1345/aph.1a314; http://journals.sagepub.com/doi/pdf/10.1345/aph.1A314

OBJECTIVE: To review available literature regarding the cardiovascular effects of marine-derived ω-3 fatty acids and evaluate the benefit of these fatty acids in the prevention of coronary heart disease. DATA SOURCES: Biomedical literature accessed through a MEDLINE search (1966–April 2002). Search terms included fish oil, omega-3 fatty acid, sudden death, hypertriglyceridemia, myocardial infarction, and mortality. DATA SYNTHESIS: Following an early 1970's observational investigation that ω-3 fatty acids may reduce the occurrence of myocardial infarction—related deaths in Greenland Eskimos, additional trials have been conducted that support this finding. Epidemiologic and clinical trial data suggest that ω-3 fatty acids may reduce the risk of cardiovascular-related death by 29–52%. In addition, the risk of sudden cardiac death was found to be reduced by 45–81%. Possible mechanisms for these beneficial effects include antiarrhythmic properties, improved endothelial function, antiinflammatory action, and reductions in serum triglyceride concentrations. ω-3 Fatty acids are fairly well tolerated; potential adverse effects include bloating and gastrointestinal distress, “fishy taste” in the mouth, hyperglycemia, increased risk of bleeding, and a slight increase in low-density-lipoprotein cholesterol. CONCLUSIONS: ω-3 Fatty acids may be beneficial and should be considered in patients with documented coronary heart disease. They may be particularly beneficial for patients with risk factors for sudden cardiac death.