What are the branches of the left circumflex artery?
What are the branches of the left circumflex artery?
Circumflex artery
| Origin | Left coronary artery |
|---|---|
| Branches | Atrial branches, anterior ventricular branches, left marginal (obtuse) branch, posterior left ventricular (posterolateral) branch, sinuatrial nodal branch, posterior interventricular branch, atrioventricular nodal branch |
Which coronary artery has obtuse marginal branches?
The left marginal artery (or obtuse marginal artery) is a branch of the circumflex artery, originating at the left atrioventricular sulcus, traveling along the left margin of heart towards the apex of the heart.
What is an obtuse marginal branch?
The obtuse marginal (OM) arteries sometimes referred to as lateral branches are branch coronary arteries that come off the circumflex artery. There can be one or more obtuse marginal arteries. It typically traverses along the left margin of heart towards the apex.
What does the left obtuse marginal artery supply?
The posterior descending artery branch supplies blood to the inferior aspect of the heart. The LMCA supplies blood to the left side of the heart. The LAD provides blood to the anterior ventricular septum and the greater portion of the anterior portion of the left ventricle.
What forms marginal artery?
The marginal artery of Drummond, also known as the marginal artery of the colon, is a continuous arterial circle or arcade along the inner border of the colon formed by the anastomoses of the terminal branches of the superior mesenteric artery (SMA) and inferior mesenteric artery (IMA).
What is left circumflex artery?
The circumflex artery branches off of the left coronary artery and supplies most of the left atrium: the posterior and lateral free walls of the left ventricle, and part of the anterior papillary muscle. The left circumflex branches decrease in diameter along their lengths.
Why is it called obtuse marginal artery?
Marginal arteries are three longest branches off of the circumflex artery supplying the lateral wall of the left ventricle, unless there is a large branching vessel which dominates the lateral left ventricular wall. When a large dominating artery is present, it is called an obtuse marginal.
What happens if the circumflex artery is blocked?
Background. Occlusion of the circumflex artery (Cx) often does not present signs in the ECG. It can lead to delayed angiography during ST-elevation myocardial infarction (STEMI).
What is the obtuse margin of heart?
Anatomical terminology The left border of heart (or left margin, or obtuse margin) is shorter than the right border, full, and rounded: it is formed mainly by the left ventricle, but to a slight extent, above, by the left atrium. It extends from a point in the second left intercostal space, about 2.5 mm.
What is marginal artery?
The marginal artery of Drummond (MA) is an anatomically variable blood vessel that forms a major anastomotic network between the superior and inferior mesenteric arteries. It vascularizes the transverse and descending colons and is a major contributor to the collateral circulation of left-colic structures.
Where does the marginal artery branch from?
Marginal artery of Drummond
| Origin | Ileocolic, right colic, middle colic, left colic and sigmoid arteries |
|---|---|
| Branches | Vasa recta |
| Supply | Large intestine |
How important is the left circumflex artery?
The left anterior descending artery branches off the left coronary artery and supplies blood to the front of the left side of the heart. The circumflex artery branches off the left coronary artery and encircles the heart muscle. This artery supplies blood to the lateral side and back of the heart.
What is major obtuse marginal branch of left circumflex?
Major OM: Major obtuse marginal branch of left circumflex (LCX) coronary artery. In this case LCX is continuing as major OM and distal LCX in the atrioventricular groove is a relatively small vessel. Distal LCX shows tight stenosis at the point beyond the origin of major OM. Major OM has a proximal irregular stenosis involving a short segment.
Is the left marginal artery an obtuse branch?
left marginal artery. [TA] a large ventricular branch of the circumflex branch of the left coronary artery that courses along the center of the left pulmonary surface (obtuse margin) of the heart, usually to the apex. Synonym(s): ramus marginalis sinister arteriae coronariae sinistrae [TA]
How many branches does the circumflex artery give off?
The circumflex artery gives off up to three obtuse marginal branches and may give off a left posterolateral branch and may supply the inferior interventricular artery (see variant anatomy below). In angiography and CTCA, the LCx is often describes as having proximal and distal segments:
Where is the left circumflex artery located in the heart?
The circumflex artery curves to the left around the heart within the coronary sulcus, giving rise to one or more diagonal or left marginal arteries (also called obtuse marginal branches (OM)) as it curves toward the posterior surface of the heart. It helps form the posterior left ventricular branch or posterolateral artery.
