Subjects in the study, a secondary analysis of the Alpha Omega Trial, consumed margarine supplemented with daily recommended doses of Omega-3 fatty acids (either 400 mg/day EPA-DHA, 2 g/day ALA, a combination of all three, or placebo) over a 40-month period. The study included 1,014 people with diabetes, ages 60-80, who had previously experienced a heart attack. The study found that all groups receiving additional amounts of these fatty acids experienced a lower incidence of events indicative of severe arrhythmias (sudden death, cardiac arrest and placement of cardioverter defibrillators), but only the group receiving a combined supplementation of all three fatty acids experienced a significantly (84 percent) lower incidence than those who received placebo.
There was no significant reduction in fatal heart attacks among any of the groups. However, those who received all three fatty acids did see a significantly (72 percent) lower incidence, compared to those who took placebo, in the combined endpoint of fatal heart attacks and indicators of severe arrhythmias.
“While more research is needed to definitively determine the role of these fatty acids in protecting people from ventricular arrhythmias, they seem to provide a benefit to the heart attack patients who also had diabetes,” said lead researcher Professor Daan Kromhout, MPH, PhD, Division of Human Nutrition, Wageningen University, in the Netherlands. “This is the first study that showed a significant protective effect of Omega-3 fatty acids in high-risk patients with diabetes who were on state-of-the-art drug treatment for their heart attack.”
Omega-3 fatty acids are essential to human health, but the body cannot make them. They are found in fish (such as salmon and tuna), plant oils (such as soybean oil or canola oil) and walnuts. The main results of the Alpha Omega Trial and recently published results from other trials did not show an effect of Omega-3 fatty acids on indicators of ventricular arrhythmias. This may be due to the fact that the patients in the present study, who had the combination of a previous heart attack and diabetes, were at higher risk of severe arrhythmias than patients who only experienced a heart attack.
To reach lead researcher Prof. Daan Kromhout, Division of Human Nutrition, Wageningen University, The Netherlands, email: firstname.lastname@example.org.
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