<qa>  What is the main risk factor for coronary heart disease?Elevated plasma cholesterol hypercholesterolemia and various other plasma lipid imbalances dyslipidemias are major risk factors for coronary heart disease. It has been established that lowering the low-density lipoprotein cholesterol plasma concentration effectively reduces cardiovascular morbidity and mortality. As a result of this finding, the National Cholesterol Education Program Adult Treatment Panel III identifies control of low-density lipoprotein cholesterol as essential in the prevention and management of coronary heart disease. 