Eventually one or more of the major coronary arteries may become blocked - either by the buildup of deposits or by a blood clot forming in the artery's narrowed passageway. The result is a heart attack. We know that there are several factors that can increase your risk for developing coronary artery disease - and thus the chances for a heart attack. Fortunately, many of these risk factors can be reduced or eliminated. The more risk factors you have, the greater your risk for heart disease and heart attack.
Heavy smokers are two to four times more likely to have a heart attack than nonsmokers.
The heart attack death rate among all smokers is 70 percent greater than among nonsmokers. People who are active regularly are more likely to cut down or stop cigarette smoking. High Blood Pressure. The higher your blood pressure, the greater your risk of developing heart disease or stroke. Regular physical activity, even of moderate intensity, can help reduce high blood pressure in some people.