"Long chain omega-3 fatty acids and cardiovascular disease: a systematic review,"
Delgado-Lista J Br J Nutr, 2012 June; 107 Suppl 2; S201-13
In this review of studies investigating the effects of omega-3 fatty acids on the rate of cardiovascular events, the authors conclude that "marine omega-3 fatty acids are effective in preventing cardiovascular events, cardiac death, and coronary events, especially in persons with high cardiovascular risk." Authors included clinical trials and randomized controlled trials of omega-3 fatty acids in capsules or through dietary intake for 6 months or longer, written in English.
A 10% overall decrease in risk of cardiovascular events (of any kind) was found,
a 9% decrease in risk of cardiac deaths,
an 18% decrease in risk of coronary events (fatal and non-fatal), and
a 5% reduction of risk was found for lower total mortality.
Most the studies included patients with high cardiovascular risk. The authors conclude that omega-3 fatty acids may be beneficial in the prevention of cardiovascular events, particularly in those with high cardiovascular risk.