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What are coronary arteries?

Coronary arteries are the arteries that bring blood to the heart. There are two main coronary arteries, one that comes off the left side of the aorta and one that comes off the right side of the aorta. The left main coronary artery branches into the circumflex artery and the left anterior descending artery (sometimes called “the widowmaker” because blockage of this artery is common in men and can lead to instant death). The right coronary artery branches into the right marginal artery and the posterior descending artery.

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