Omega-3s may reduce your risk of recurrent heart attacks.  The best way to get them is by eating fatty fish--but not all fish are created equal.
D000818:Animals; D003324:Coronary Artery Disease / Q000517:prevention & control*; D004435:Eating; D015525:Fatty Acids, Omega-3 / Q000627:therapeutic use*; D005399:Fishes; D006801:Humans; D008628:Mercury / Q000633:toxicity; D009752:Nutritional Status; D018570:Risk Assessment; D012307:Risk Factors; D055502:Secondary Prevention
D015525:Fatty Acids, Omega-3; D008628:Mercury