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The right coronary artery supplies oxygenated blood to the right atrium, the right ventricle, and the posterior third and inferior end of the interventricular septum. [2] [5] It may also supply 25% to 35% of the left ventricle (LV). [10] There is significant overlap of supply of the coronary arteries. [2]
The SA node is located in the wall of the right atrium, laterally to the entrance of the superior vena cava in a region called the sinus venarum (hence sino-+ atrial). [5] It is positioned roughly between a groove called the crista terminalis located on the internal surface of the heart and the corresponding sulcus terminalis , on the external ...
The atrial branches of right coronary artery derive from the right coronary artery and provide part of the blood supply to the right atrium and left atrium. Although named for the right coronary artery in Terminologia anatomica , a portion of the blood supply to the atria derives from the Circumflex branch of left coronary artery .
The right atrial appendage (lat: auricula atrii dextra) is located at the front upper surface of the right atrium. Looking from the front, the right atrial appendage appears wedge-shaped or triangular. Its base surrounds the superior vena cava. [6] The right atrial appendage is a pouch-like extension of the right atrium and is covered by a ...
The CAJ is the joint between the superior vena cava and the atrium. The cavoatrial junction (CAJ) is the point at which the superior vena cava meets and melds into the superior wall of the cardiac right atrium. Both the superior and inferior vena cavae enter the right atrium, but only the superior entry is called the cavoatrial junction.
The AV node receives two inputs from the right atrium: posteriorly, via the crista terminalis, and anteriorly, via the interatrial septum. [8] Contraction of heart muscle cells requires depolarization and repolarization of their cell membranes. Movement of ions across cell membranes causes these events.
It is an anatomical area located at the base of the right atrium, and its boundaries are the coronary sinus orifice, tendon of Todaro, and the septal leaflet of the right atrioventricular valve (also known as the tricuspid valve). [2] It is anatomically significant because the atrioventricular node is located at the apex of the triangle. The ...
The function of the right heart, is to collect de-oxygenated blood, in the right atrium, from the body via the superior vena cava, inferior vena cava and from the coronary sinus and pump it, through the tricuspid valve, via the right ventricle, through the semilunar pulmonary valve and into the pulmonary artery in the pulmonary circulation ...