Left coronary artery

(Redirected from Ramus intermedius)

The left coronary artery (LCA, also known as the left main coronary artery, or left main stem coronary artery) is a coronary artery that arises from the aorta above the left cusp of the aortic valve, and supplies blood to the left side of the heart muscle.[citation needed] The left coronary artery typically runs for 10–25 mm, then bifurcates into the left anterior descending artery, and the left circumflex artery.[1]

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
SourceAscending aorta
Branches
Identifiers
Latinarteria coronaria sinistra
TA98A12.2.03.201
TA24142
FMA50040
Anatomical terminology

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]

Structure

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Variation

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Sometimes, an additional artery arises at the bifurcation of the left main artery, forming a trifurcation; this extra artery is called the ramus or intermediate artery.[2]

A "first septal branch" is sometimes described.[3]

Additional images

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See also

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References

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  1. ^ Laird, Robert J.; Irwin, Scot (2004-01-01), Irwin, Scot; Tecklin, Jan Stephen (eds.), "Chapter 1 - Cardiovascular Structure and Function", Cardiopulmonary Physical Therapy (Fourth Edition), Saint Louis: Mosby, pp. 3–38, doi:10.1016/b978-032301840-1.50005-0, ISBN 978-0-323-01840-1, retrieved 2020-11-20
  2. ^ Fuster, V; Alexander RW; O'Rourke RA (2001). Hurst's The Heart (10th ed.). McGraw-Hill. p. 53. ISBN 0-07-135694-0.
  3. ^ Verna E, Santarone M, Boscarini M, Ghezzi I, Repetto S (June 1988). "Unusual origin and course of the first septal branch of the left coronary artery: angiographic recognition". Cardiovasc Intervent Radiol. 11 (3): 146–9. doi:10.1007/BF02577106. PMID 3139296. S2CID 20395578.
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