types of heart disease
Coronary Heart Disease (CHD) is the most common form of heart disease. It occurs when the arteries supplying blood to the heart narrow or harden from the build-up of plaque. Plaque is made up of fat, cholesterol and other substances found in the blood. This plaque build-up is also known as atherosclerosis. The site of the plaque determines the type of heart disease: 1  Coronary artery disease is the build-up of plaque in the arteries supplying blood to the heart. 2  Peripheral artery disease is the build-up of plaque in the arteries supplying blood to the arms and legs.