Researchers looked at nearly 30,000 people in 52 countries and found that 90% of heart attacks can be attributed to nine risk factors. First, smoking takes a lot of blame, and so does an abnormal ratio of the so-called good and bad cholesterol particles in the blood. Those two factors trigger two-thirds of the global risk for heart attack.
Also, according to the study, other risk factors include high blood pressure, diabetes, abdominal obesity, stress, lack of fruits and vegetables in the diet, and lack of daily exercise. Finally, how much alcohol you drink also plays a role, but that's not necessarily on the bad side.
Researchers found people who drink alcohol in moderation have a lower risk than those who don't drink at all.