The discomfort or pain in the chest that is characteristic of angina is caused by a lack of oxygen-rich blood being delivered to the muscle cells of the heart. Coronary artery disease is the most common reason why people experience angina. The majority of the time, atherosclerosis is the root cause of coronary artery disease. When this condition is present, fatty deposits known as plaque build up along the interior walls of blood arteries, which are responsible for supplying the pounding heart with oxygen and nutrition.
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