The heart is a muscle like any other in the body. It needs blood flow to supply oxygen to allow it to do work. When there isn’t enough oxygen, the muscle starts to suffer, and when there is no oxygen, the muscle starts to die.
Heart muscle gets its blood supply from arteries that start in the aorta and run on the surface of the heart, known as the coronary arteries. The right coronary artery supplies the right ventricle of the heart and the inferior (lower) portion of the left ventricle. The left anterior descending coronary artery supplies the majority of the left ventricle, while the circumflex artery supplies the back of the left ventricle.
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