Sinoatrial node
Sinoatrial node
Definition
The part of the cardiac conduction system that controls the timing of heart muscle contraction. It relays electrical signals to the AV node[GO]. Subdivision of conducting system of heart at the junction of the right atrium and the superior vena cava, around the sinoatrial nodal branch of right coronary artery and is continuous with the internodal tract[FMA].
Also known as cardiac pacemaker, Koch's node, node of Keith-Flack, nodus sinuatrialis, SA nodal muscle tissue, SA node, sinoatrial node, sinu-atrial node, sinuatrial nodal muscle tissue, sinuatrial node, sinus node, sinus node of Keith and Flack — per UBERON
The Sinoatrial node is a part of the Cardiovascular.