Coronary arteries
The vessels that supply the heart muscle with blood rich in oxygen. They are called the coronary arteries because they encircle the heart in the manner of a crown. The word "coronary" comes from the Latin "corona" and Greek "koron" meaning crown. Like other arteries, the coronaries may be subject to arteriosclerosis (hardening of the arteries). There are a number of coronary arteries. Those most often bypassed today include the right coronary artery, the posterior descending coronary artery, the left main coronary artery, the left anterior descending coronary artery and the left circumflex coronary artery. Plaques obstructing the coronary arteries may also be treated by balloon angioplasty, stents, and other techniques.

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the arteries supplying blood to the heart. The right and left coronary arteries arise from the aorta, just above the aortic valve, and form branches encircling the heart. See coronary angioplasty, coronary bypass graft.

Medical dictionary. 2011.

Look at other dictionaries:

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