The circumflex artery of the heart is a continuation of the left coronary artery after its division from the anterior interventricular artery within the coronary groove on the upper right sternocostal surface of the heart. Just after its commencement, it may give off three separate branches:
It continues over the left heart border within the groove, giving off multiple branches to the left ventricle and left atrium. Finally, it anastomoses with fine arterioles of the right coronary artery around the inferior margin of the left atrium.
The circumflex artery supplies the:
Very rarely, the circumflex artery may arise from the right aortic sinus instead of the left coronary artery.
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