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Encyclopedia > Left main coronary artery
Artery: Left coronary artery
Base of ventricles exposed by removal of the atria. (Left coronary artery visible at left.)
The arch of the aorta, and its branches.
Latin arteria coronaria sinistra
Gray's subject #142 547
Source ascending aorta
Branches anterior interventricular
circumflex
Dorlands/Elsevier a_61/12154070

The left coronary artery, abbreviated LCA and also known as the left main coronary artery (often abbreviated LMCA), arises from the aorta above the left cusp of the aortic valve. Image File history File links Download high resolution version (451x700, 149 KB) Summary Licensing File links The following pages link to this file: Aorta Pulmonary artery Wikipedia:Grays Anatomy images with missing articles 11 Ligamentum arteriosum Aortic arch List of images in Grays Anatomy: VI. The Arteries Ascending... For the embryological structure, see Aortic arches. ... Latin is an ancient Indo-European language originally spoken in Latium, the region immediately surrounding Rome. ... The arch of the aorta, and its branches. ... The LAD, or left anterior descending artery (or anterior interventricular branch of the left coronary artery, or anterior descending branch) passes at first behind the pulmonary artery and then comes forward between that vessel and the left auricula to reach the anterior interventricular sulcus, along which it descends to the... The LCX, or left circumflex artery (or circumflex artery, or circumflex branch of the left coronary artery) follows the left part of the coronary sulcus, running first to the left and then to the right, reaching nearly as far as the posterior longitudinal sulcus. ... Elseviers logo. ... The aortic valve is one of the valves of the heart. ...


It typically runs for 1 to 25 mm and then bifurcates into the left anterior descending (LAD) artery and the left circumflex artery (LCX). The LAD, or left anterior descending artery (or anterior interventricular branch of the left coronary artery, or anterior descending branch) passes at first behind the pulmonary artery and then comes forward between that vessel and the left auricula to reach the anterior interventricular sulcus, along which it descends to the... The LCX, or left circumflex artery (or circumflex artery, or circumflex branch of the left coronary artery) follows the left part of the coronary sulcus, running first to the left and then to the right, reaching nearly as far as the posterior longitudinal sulcus. ...


The part that is between the aorta and the bifurcation only is known as the left main artery (LM), while the term 'LCA' might refer to just the left main, or to the left main and all its eventual branches.


If an artery arises from the left main between the LAD and LCX, it is known as the ramus intermedius. The ramus intermedius occurs in 37%[citation needed] of the general population, and is considered a normal variant.


Additional images

See also

The coronary circulation consists of the blood vessels that supply blood to and from the heart muscle itself. ...

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