Left coronary artery

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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 (ramus intermedius)
Dorlands / Elsevier	a_61/12154070

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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.

Branching

It typically runs for 1 to 25 mm and then bifurcates into the anterior interventricular artery (also called left anterior descending (LAD)) artery and the left circumflex artery (LCX).

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% of the general population, and is considered a normal variant.

Additional images

A coronary angiogram that shows the LMCA, LAD and LCX	A coronary angiogram that shows the LMCA, LAD and LCX	A coronary angiogram that shows the LMCA, LAD and LCX	A coronary angiogram that shows the LMCA, LAD and LCX
A coronary angiogram that shows the LMCA, LAD and LCX

See also

• Coronary circulation

External links

• SUNY Figs 20:03-01 - "Anterior view of the heart."
• Left+coronary+artery at eMedicine Dictionary
• 00463 at CHORUS

v • d • e List of arteries of torso - chest
Pulmonary / coronary	right coronary: SA nodal - AV nodal - atrial - right marginal - posterior interventricular left coronary: anterior interventricular - left circumflex - left marginal
Ascending aorta	aortic arch - brachiocephalic (thyreoidea ima) - common carotid
Subclavian	internal thoracic: anterior intercostal - thymic - pericardiacophrenic - terminal (musculophrenic, superior epigastric) costocervical trunk: highest intercostal (posterior intercostal 1-2) - deep cervical
Descending / thoracic aorta	visceral: bronchial - esophageal - mediastinal parietal: posterior intercostal 3-11 - subcostal - superior phrenic

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Acknowledgement and Attribution Regarding Sources of Content

Some of the initial content on this page may be incorporated in part from copyleft sources in the public domain including wikis such as Wikipedia and AskDrWiki. Drug information for patients came from the The National Library of Medicine. Infectious disease information may have come from the Centers for Disease Control (CDC). Differential Diagnoses are drawn from clinicians as well as an amalgamation of 3 sources: 1.The Disease Database; 2. Kahan, Scott, Smith, Ellen G. In A Page: Signs and Symptoms. Malden, Massachusetts: Blackwell Publishing, 2004:3; 3. Sailer, Christian, Wasner, Susanne. Differential Diagnosis Pocket. Hermosa Beach, CA: Borm Bruckmeir Publishing LLC, 2002:7 .