The heart is a muscular pump that works throughout your life to keep blood circulating through the entire body. It has high demands in terms of oxygen and nutrients and this is supplied to the heart muscle by the coronary arteries. When the coronary arteries are blocked, oxygen and food cannot reach the heart muscle.Without the necessary supply. the heart muscle is suffocated and the dies. This is known as a heart attack or myocardial infarction (MI).
