Location The AV<unk>  lies at the lower back section of the interatrial septum near the opening of the coronary sinus, which conducts the normal electrical impulse from the atria to the ventricles. The AV<unk>  is quite compact (~1 x 3 x 5 mm). It is located at the center of Koch's triangle—a triangle enclosed by the septal leaflet of the tricuspid valve, the coronary sinus, and the membranous part of the interatrial septum. Blood supply The blood supply of the AV<unk>  is from the<unk> l branch. The origin of this artery is most commonly (80-90% of hearts) a branch of the right coronary artery, with the remainder originating from the left circumflex artery. This is associated with the dominance of the coronary artery circulation. In right-dominant individuals the blood supply is from the right coronary artery while in left dominant individuals it originates from the left circumflex artery. Development BMP (Bone morphogenetic protein) cell signaling plays a key role in diverse aspects of cardiac differentiation and morphogenesis. (BMPs) are multifunctional signaling molecules critical for the development of AV<unk> . BMP influences AV<unk>  development through Alk3 receptor (Activin receptor-like kinase 3). Abnormalities seen in BMP and Alk3 are associated with some cardiovascular diseases like Ebstein’s anomaly and AV conduction disease.
Atrioventricular node
Node of Ranvier
Heart valve
Cardiopulmonary nerves
Vasa vasorum
Endobronchial valve
Coronary
Sternal saw