| Left coronary artery | |
|---|---|
 Heart viewed from above, atria removed, base of ventricles exposed. Left coronary artery visible at left. | |
 Heart viewed from the front. Coronary arteries (labeled in red text) and other major landmarks (in blue text). Left coronary artery is at upper right in the image. | |
| Details | |
| Source | Ascending aorta |
| Branches |
|
| Identifiers | |
| Latin | arteria coronaria sinistra |
| TA98 | A12.2.03.201 |
| TA2 | 4142 |
| FMA | 50040 |
| Anatomical terminology | |
Theleft coronary artery (LCA, also known as theleft main coronary artery, orleft main stem coronary artery) is acoronary artery that arises from theaorta above theleft cusp of theaortic valve, and supplies blood to the left side of theheart muscle.[citation needed] The left coronary artery typically runs for 10–25 mm, then bifurcates into theleft anterior descending artery, and theleft circumflex artery.[1]
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.[citation needed]
Sometimes, an additional artery arises at the bifurcation of the left main artery, forming a trifurcation; this extra artery is called theramus orintermediate artery.[2]
A "first septal branch" is sometimes described.[3]
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