Genes and heart disease
Heart disease runs in some families. This can be due to variations in the genes that affect the levels of cholesterol in the blood. People with familial hypercholesterolaemia are born with twice the normal level of cholesterol in their blood. Other people have gene variants that increase blood pressure, or the tendency of the blood to form clots. For people with an increased genetic risk, a healthy diet and lifestyle are even more important in reducing their risk of heart disease.