New! Sign up for our free email newsletter.
Science News
from research organizations

Fish oil supplements have little effect on irregular heartbeat

Date:
October 14, 2014
Source:
Montreal Heart Institute
Summary:
High doses of fish oil supplements, rich in omega-3 fatty acids, do not reduce atrial fibrillation, a common type of irregular heartbeat in which the heart can beat as fast as 150 beats a minute, results from a clinical trial indicate.
Share:
FULL STORY

High doses of fish oil supplements, rich in omega-3 fatty acids, do not reduce atrial fibrillation, a common type of irregular heartbeat in which the heart can beat as fast as 150 beats a minute. The results of the AFFORD trial led by the Montreal Heart Institute were published in the Journal of the American College of Cardiology on October 7th.

For the trial, 337 patients with atrial fibrillation not receiving conventional antiarrhythmic therapy were randomly assigned to 4 grams of fish oil a day or to placebo for up to 16 months. 64.1 % of patients who had received fish oil experienced a recurrence of atrial fibrillation compared to 63.2 % of those taking placebo. Furthermore, the study concluded that fish oil supplements did not reduce inflammation or oxidative stress markers, which may explain its lack of efficacy.

"Fish oil has no role in the rhythm-control management of atrial fibrillation," said lead investigator Dr. Anil Nigam, Cardiologist at the Montreal Heart Institute and Associate Professor of Medicine at the University of Montreal. "What is well-known and should be recommended to prevent heart disease and reduce blood pressure is a Mediterranean-type diet rich in natural omega-3 fats and other nutrients, including fresh fruits and veggies, legumes, olive oil, while lowering intake of red meat, trans fats and saturated fats. We believe that such a strategy might also be beneficial for the treatment of atrial fibrillation although more studies are required."

About atrial fibrillation

Atrial fibrillation is the most common type of arrhythmia affecting approximately 350,000 Canadians. That number is likely to increase as the population ages. The risk of developing atrial fibrillation increases with age and with other risk factors such as obesity, diabetes, high blood pressure and underlying heart disease. Some heart conditions, such as heart failure and heart valve problems can also increase the risk of suffering from atrial fibrillation.


Story Source:

Materials provided by Montreal Heart Institute. Note: Content may be edited for style and length.


Journal Reference:

  1. Anil Nigam, Mario Talajic, Denis Roy, Stanley Nattel, Jean Lambert, Anna Nozza, Peter Jones, Vanu R. Ramprasath, Gilles O’Hara, Stephen Kopecky, James M. Brophy, Jean-Claude Tardif. Fish Oil for the Reduction of Atrial Fibrillation Recurrence, Inflammation, and Oxidative Stress. Journal of the American College of Cardiology, 2014; 64 (14): 1441 DOI: 10.1016/j.jacc.2014.07.956

Cite This Page:

Montreal Heart Institute. "Fish oil supplements have little effect on irregular heartbeat." ScienceDaily. ScienceDaily, 14 October 2014. <www.sciencedaily.com/releases/2014/10/141014160400.htm>.
Montreal Heart Institute. (2014, October 14). Fish oil supplements have little effect on irregular heartbeat. ScienceDaily. Retrieved February 27, 2024 from www.sciencedaily.com/releases/2014/10/141014160400.htm
Montreal Heart Institute. "Fish oil supplements have little effect on irregular heartbeat." ScienceDaily. www.sciencedaily.com/releases/2014/10/141014160400.htm (accessed February 27, 2024).

Explore More
from ScienceDaily

RELATED STORIES