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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.
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 right marginal arteries perfuse the right ventricle and the posterior descending artery perfuses the left ventricular posterior and inferior walls. There is also the conus artery , which is only present in about 45 percent of the human population, and which provides collateral blood flow to the heart when the left anterior descending artery ...
The Arc of Riolan (Riolan's arcade, Arch of Riolan, Haller's anastomosis), also known as the meandering mesenteric artery, is another vascular arcade present in the colonic mesentery that connect the proximal middle colic artery with a branch of the left colic artery. This artery is found low in the mesentery, near the root.
Within this margin can be found the obtuse marginal artery, which is the a branch of the left circumflex artery. It extends from a point in the second left intercostal space , about 2.5 mm. from the sternal margin , obliquely downward, with a convexity to the left, to the apex of the heart .
The circumflex artery arises from the left coronary artery and follows the coronary sulcus to the left. Eventually, it will fuse with the small branches of the right coronary artery. The larger left anterior descending artery (LAD), is the second major branch arising from the left coronary artery. It follows the anterior interventricular sulcus ...
[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 ] 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 ...
Marginal artery can refer to: Marginal artery of the colon, also known as the artery of Drummond; Right marginal branch of right coronary artery, a branch of the right coronary artery that follows the acute margin of the heart; Left marginal artery, a branch of the circumflex artery, traveling along the left margin of heart
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