Circumflex branch of left coronary artery

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.

Circumflex branch of left coronary artery
Base and diaphragmatic surface of heart. (Circumflex branch not visible, but would be near the coronary sinus.)
Base of ventricles exposed by removal of the atria. (Circumflex branch not visible, but bifurcation of left coronary artery visible at left.)
Details
SourceLeft coronary artery
BranchesLeft atrial branch
left marginal artery
posterolateral artery
sinuatrial nodal artery (in some people)
posterior interventricular artery (in some people)
SuppliesPosterolateral left ventricle, anterolateral papillary muscle, the sinoatrial nodal artery in 38% of people.
Identifiers
Latinramus circumflexus arteriae coronariae sinistrae
TA98A12.2.03.206
TA24148
FMA3895
Anatomical terminology

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.

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