VITAL study
A primary prevention study involving 20,000-25,000 relatively healthy Americans, which used 850 mg/day of EPA+DHA (one Lovaza capsule) and showed a 20% reduction in heart attacks and fatal heart attacks, particularly in those with low fish intake, despite media reports of a 'neutral' outcome.
Videos Mentioning VITAL study

#83 – Bill Harris, Ph.D.: Omega-3 fatty acids
Peter Attia MD
A primary prevention study involving 20,000-25,000 relatively healthy Americans, which used 850 mg/day of EPA+DHA (one Lovaza capsule) and showed a 20% reduction in heart attacks and fatal heart attacks, particularly in those with low fish intake, despite media reports of a 'neutral' outcome.

The Optimal Omega-3 Protocol for Heart, Brain, & Longevity
FoundMyFitness
A large trial that investigated the effects of a low dose of omega-3s (840mg of a combination of EPA and DHA) and found a 28% lower heart attack risk and 17% lower coronary artery disease risk.