coronary arteries

Right Coronary Artery

Right Coronary Artery The structure indicated is the right coronary artery of the heart. The coronary arteries arise from the aortic sinuses of the ascending aorta. The right coronary artery (RCA) arises from the right aortic sinus and the left coronary from the left aortic sinus. The right coronary artery then runs in the coronary sulcus, which separates the atria from the ventricles. The right coronary artery gives off the following branches: Atrial arteries Right marginal branch Posterior interventricular branch (posterior descending artery) The coronary artery from which the posterior descending artery arises determines the coronary dominance. The posterior descending artery …

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right coronary artery

Posterior Interventricular (Descending) Artery

Posterior Interventricular (Descending) Artery The structure indicated is the posterior interventricular artery (posterior descending artery) of the heart. The posterior interventricular artery determines the “dominance” of the coronary blood supply to the heart. For example, if the posterior interventricular artery arises from the right coronary artery, the heart is said to be “right coronary dominant”. In the majority of people, the posterior interventricular artery will usually arise from the right coronary artery. If the posterior interventricular artery arises from the left coronary artery, it will branch from the circumflex coronary artery. Co-dominance occurs when the posterior interventricular artery arises from …

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Posterior Interventricular (Descending) Artery

Left Anterior Descending Artery

Left Anterior Descending Artery The structure indicated is the left anterior descending artery (also known as the anterior interventricular artery). The left anterior descending artery is one of the coronary arteries which supplies the anterior and lateral parts of the myocardium and the interventricular septum. It is responsible for approximately 45-55% of the left ventricles blood supply. The left coronary artery arises from the left aortic sinus of the ascending aorta. The left coronary artery has two terminal branches: Left anterior descending (LAD)/anterior interventricular Circumflex branch The left anterior descending artery itself has two different types of branches Septal branches …

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Left Anterior Descending Artery