heart 4A double-blind, placebo-controlled study appearing in the journal Circulation (2005; 112(18): 2762-8) looked at 402 patients with cardioverter/defibrillator implants. The patients received either a fish oil supplement (containing 2.5 g of EPA) or a placebo containing olive oil for one year. Supplementation with fish oil significantly reduced the instance of ventricular fibrillation and ventricular tachycardia—and reduced the instance of death from those events. Supplementation with fish oil may well reduce the risk of arrhythmias and death in high risk patients.