According to the Wall Street Journal's coverage of the study:
"People with the healthiest diets—those with the highest intakes of fruit, vegetables, whole grains, nuts, and a higher intake of fish relative to meat poultry and eggs—were 35% less likely to die from a repeat heart attack or stroke during the length of the study, compared with those with the least healthy diets, according to the five-year study of 32,000 people in 40 countries.
They also were 28% less likely to develop congestive heart failure, 14% less likely to have an additional heart attack and 19% less likely to have a stroke."
Those numbers are very impressive and speak to the power of healthy diets, whether you are a person with heart disease or not. What's the diet that the research team behind the study advocates based on their research?
At least two servings of fish and four servings of nuts or seeds are recommended each week, along with limiting processed meat to no more than two servings a week."
Read more on this study in the WSJ's article titled "Diet's Role In Lowering Risk of Repeat Heart Attacks."