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Jul 13, 2023 · This article covers the anatomy of the coronary arteries and cardiac veins, their branches, pathways, and supply. Click now to learn more at Kenhub!
Aug 17, 2023 · The terminal arborization of the right branch supplies the papillary muscle and recurs to supply the rest of the ventricular wall. The left bundle branch or crus sinistrum (Latin) branches from the atrioventricular bundle at the start of the muscular interventricular septum.
Jan 8, 2024 · The coronary circulation refers to the vessels that supply and drain the heart. Coronary arteries are named as such due to the way they encircle the heart, much like a crown. This article will outline the naming, distribution, and clinical relevance of vessels in the coronary circulation.
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- Heart anatomy. The heart has five surfaces: base (posterior), diaphragmatic (inferior), sternocostal (anterior), and left and right pulmonary surfaces. It also has several margins: right, left, superior, and inferior
- Heart valves. Heart valves separate atria from ventricles, and ventricles from great vessels. The valves incorporate two or three leaflets (cusps) around the atrioventricular orifices and the roots of great vessels.
- Blood flow through the heart. The blood flow through the heart is quite logical. It happens with the heart cycle, which consists of the periodical contraction and relaxation of the atrial and ventricular myocardium (heart muscle tissue).
- Coronary circulation. The heart must also be supplied with oxygenated blood. This is done by the two coronary arteries: left and right. Heart muscles work constantly (thank goodness!)
- Right Coronary Artery
- Left Coronary Artery
- Coronary Artery Dominance
- Coronary Artery Disease
The right coronary arteryarises from the anterior aortic sinus at the beginning of the ascending aorta. It passes between the right auricle and the pulmonary trunk in the atrioventricular groove. It gives rise to a number of atrial and ventricular branches within the groove before turning posteriorly to pass onto the diaphragmatic surface of the he...
The left coronary artery arises from the left posterior aortic sinus. It passes behind the pulmonary trunk and emerges between the left auricle and the infundibulum of the right ventricle. The left coronary is the larger of the coronary arteries. It soon divides into two terminal branches: the circumflex and anterior interventricular branches.
The coronary artery giving off the posterior interventricular artery determines coronary artery dominance. The posterior interventricular artery is most commonly a branch of the right coronary artery, but arises from the left circumflex branch in 10% of cases. Equal dominance occurs when branches from the right and left coronary arteries run within...
The coronary arteries are essentially functional end arteries, though some anastomoses exist at the arteriolar level. Anastamoses can potentially occur between the arteries within the atrioventricular groove, the interventricular and conus branches. In slow occlusion, arterioles may develop between the branches described. However, these anastomoses...
Explain the structure and function of venous valves in the large veins of the extremities. Blood is carried through the body via blood vessels. An artery is a blood vessel that carries blood away from the heart, where it branches into ever-smaller vessels.
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3 days ago · heart, organ that serves as a pump to circulate the blood. It may be a straight tube, as in spiders and annelid worms, or a somewhat more elaborate structure with one or more receiving chambers (atria) and a main pumping chamber (ventricle), as in mollusks. In fishes the heart is a folded tube, with three or four enlarged areas that correspond ...
