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Circumflex branch of left coronary artery

Artery of the heart

Summary

Artery of the heart

Field	Value
Name	Circumflex branch of left coronary artery
Latin	ramus circumflexus arteriae coronariae sinistrae
Image	Gray491.png
Caption	Base and diaphragmatic surface of heart. (Circumflex branch not visible, but would be near the coronary sinus.)
Image2	Gray495.png
Caption2	Base of ventricles exposed by removal of the atria. (Circumflex branch not visible, but bifurcation of left coronary artery visible at left.)
BranchFrom	Left coronary artery
BranchTo	Left atrial branch
left marginal artery
posterolateral artery
sinuatrial nodal artery (in some people)
posterior interventricular artery (in some people)
Supplies	Posterolateral left ventricle, anterolateral papillary muscle, the sinoatrial nodal artery in 38% of people.

left marginal artery posterolateral artery sinuatrial nodal artery (in some people) posterior interventricular artery (in some people) The circumflex branch of left coronary artery (also known as the left circumflex artery or circumflex artery) is a branch of the left coronary artery. It winds around the left side of the heart along the atrioventricular groove (coronary sulcus). It supplies the posterolateral portion of the left ventricle.

In a minority of individuals, the left circumflex artery gives rise to the posterior interventricular artery, in which cases such a heart is deemed left dominant.

Anatomy

The left circumflex 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. There have been multiple anomalies described, for example the left circumflex having an aberrant course from the right coronary artery.

Branches

The circumflex artery curves to the left around the heart within the coronary sulcus, giving rise to one or more left marginal arteries (also called obtuse marginal branches) as it curves toward the posterior surface of the heart. It helps form the posterior left ventricular branch or posterolateral artery. The circumflex artery ends at the point where it joins to form to the posterior interventricular artery in 15% of all cases, which lies in the posterior interventricular sulcus. In the other 85% of all cases the posterior interventricular artery comes out of the right coronary artery. When the left circumflex supplies the posterior descending artery in those 15% of cases, it is known as a left dominant circulation.

Distribution

The circumflex artery supplies the posterolateral left ventricle and the anterolateral papillary muscle.

It also supplies the sinoatrial nodal artery in 38% of people.

It supplies 15–25% of the left ventricle in right-dominant systems. If the coronary anatomy is left-dominant, the circumflex artery supplies 40–50% of the left ventricle.

Additional images

File:Coronary arteries.svg|Coronary arteries (labeled in red text) and other major landmarks (in blue text). Left circumflex artery is labeled at right. File:Cardiac vessels.png|Cardiac vessel schematic File:Human heart with coronary arteries new.png|Human heart with coronary arteries File:Heart coronary territories.jpg|Heart coronary territories File:Heart left lateral coronaries diagram.svg|Heart left lateral coronaries diagram

References

Wilson, Alexander. (2022). "Anatomy, Thorax, Coronary Sinus". StatPearls Publishing.
(1 October 1974). "Anomalous Origin of the Left Circumflex Coronary Artery: Recognition, Angiographic Demonstration and Clinical Significance". Circulation.
Keith L. Moore. (2010). "Clinically oriented anatomy". Wolters Kluwer Health/Lippincott Williams & Wilkins.

Wikipedia Source

This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.

arteries-of-the-thorax

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