Risk Factors for Heart Disease

Role of Diet

Studies have shown that population groups whose diets are rich in cholesterol and other animal and dairy fats have more heart attacks that those whose diets are low in these saturated fats. Americans, whose diets are high in meat and eggs, have a higher incidence of heart disease than the Japanese, who end to eat very little meat and other animal and dairy fats.

Studies have also shown that high blood cholesterol -- more than 200 miligrams per mililiter of blood -- can be lowered by modifying the diet. This means eating more fish and poultry while cutting consumption of red meat, eggs, butter and other dairy fats, and increasing consumption of fruits, vegetables and cereal grains. Substituting polyunsaturated cooking oils (corn, safflower or sunflower oil, for example) for lard or hardened shortening, and using margarines whose labels indicate a high ratio of polyunsaturated to saturated fats (for example, 4 to 2) instead of butter or margarines with less favorable ratios (e.g., equal or 2 to 3) also help to lower blood cholesterol.

Role of High Blood Pressure

People with high blood pressure have a marked increase in heart attacks and strokes. The cause of most high blood pressure is unkown, but it usually can be lowered by the use of antihypertensive drugs, reduced salt intake, and weight loss in people who are overweight. Controlling high blood pressure is an important preventive measure because it increases the work load of the heart and also directly contributes to hardening of the arteries (arteriosclerosis).

Role of Cigarette Smoking

Since 1964, when the Surgeon General reported that cigarette smokers on the average had a 70 percent greater chance of having a heart attack than nonsmokers, many other studies have confirmed that cigarette smoking is a major risk factor. This risk increases with the number of cigarettes smoked, and recent studies hae found that low-tar, low-nicotine cigarettes do not lower the risk of heart disease. Stopping smoking is now considered one of the best things you can do to help prevent a heart attack.