the AV node.
Atrioventricular (AV) Node
The normal heartbeat begins as an electrical impulse in the sino-atrial node (or SA node). The SA node is called the pacemaker of the heart. It is located in the R atrium, just below the entrance of the superior vena cava.
The primary pacemaker of a normal healthy heart is the sinus node (or SA node). It is located in the right atria of the heart.
As the name suggests, (atrioventricular node) it is located between the atrium and ventricle or the top and bottom chamber of one side of the heart.
atrioventricular node (AV node)
The sino-atrial node (SA node) and, specifically the tissue of Bachmann's Bundle located within the SA node.
Sinoatrial Node
Sinoatrial node is located at the junction of the superior vena cava with the right atrium. It is the normal cardiac pacemaker.
The anterior, upper part of the right atrium.The Sinoatrial Node or SA Node is located in the right Atrium of the Heart. The SA node is responsible of the normal sinus rhythm.
It is located in the wall of the right atrium near the tricuspid valve.
Paraction (located in the Stenness Node).