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Left coronary artery

Other Terms: Left coronary arterial tree, Arteria coronaria sinistra, Artère coronaire gauche


The left coronary artery arises from the aortic sinus above the edge of the left anterior semilunar valve. The left coronary artery is smaller than the right coronary artery. It emerges from between the left auricle and the pulmonary artery to enter the front of the left coronary· sulcus. Here, it divides into two branches: the interventricular branch, passing clown the anterior interventricular groove to anastomose at the apex with the corresponding posterior branch, and the transverse branch, passing around the left coronary sulcus to the back of the heart. There it anastomoses with the similar branch of the right coronary artery. It gives off auricular branches to supply the left atrium; a marginal branch along the left margin of the heart, and a smaller branch to the left atrium, both ventricles, and the roots of the aorta and pulmonary artery.


Arteria coronaria sinistra


Artère coronaire gauche


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