Coronary Artery Disease is one of the most common heart diseases in Singapore. It refers to the narrowing or obstruction of the arteries that supply blood to the heart. The narrowing of the arteries occurs due to the build-up of fatty deposits in the wall of the arteries. These fatty deposits, called plaques, accumulate over the years and can eventually clog the blood flow to the heart muscle. Coronary Artery Disease can lead to chest pain and shortness of breath (angina) during exertion or stress, heart attack and heart failure.