Omega-3 fatty acids have become a popular supplement taken by millions of people anxious to avoid heart disease. But the FDA says that a prescription strength version of the fish oil supplement failed to help patients with atrial fibrillation in a large study. A total of 663 patients suffering from erratic heart beats were split into two groups and given either the prescription treatment Lovaza or a placebo over a six month period. The drug was well tolerated but failed to register on the efficacy side of the equation. Report