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by Loveyourbody00 on 7/26/2011 with 0 replies |
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The heart is like any other muscle, requiring blood to supply oxygen and nutrients for it to function. The heart's needs are provided by the coronary arteries, which begin at the base of the aorta and spread across the surface of the heart, branching out to all areas of the heart muscle.
The coronary arteries are at risk for narrowing as cholesterol deposits, called plaques, build up inside the artery. If the arteries narrow enough, blood supply to the heart muscle may be compromised (slowed down), and this slowing of blood flow to the heart causes pain, or angina.
A heart attack or myocardial infarction occurs when a plaque ruptures, allowing a blood clot to form. This completely obstructs the artery, stopping blood flow to part of the heart muscle, and that portion of muscle dies.
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