Your heart is a muscle a very important muscle that your entire body depends on. As with all muscles, the heart is dependent on blood supply to provide necessary nutrients, fuel and oxygen. The heart gets its blood supply from the coronary arteries. When the coronary arteries become blocked, narrowed, or completely obstructed, the heart cannot get the nutrients, fuel, and oxygen it needs. This causes the heart to become weak, develop a heart attack or stop altogether. This blockage, narrowing or obstruction is known as Coronary Artery Disease (CAD).
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