The atrioventricular node (abbreviated AV node) is a part of the electrical control system of the heart that coordinates the top of the heart. It electrically connects atrial and ventricular chambers.[1] The AV node is an area of specialized tissue between the atria and the ventricles of theheart, specifically in the posteroinferior region 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 node is quite compact (~1 x 3 x 5 mm).[2] 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 membraneous part of the interatrial septum.[3]
The AV node may also be (rarely) referred to as the Aschoff-Tawara node named so after Ludwig Aschoff and Sunao Tawara.[4]
There is no coordination between the atria and the ventricles, and ventricular filling can become compromised.
I think you mean 'AV Node'. If so, then it is part of the hearts pace maker called the Atrio-ventricular node. It emits an electric pulse across the ventricles to make them contract (ventricular systole). This pulse would have come from the SA (Sino-atrial) node, which would have made the atria contract before the electric pulse reached the AV node.
the atriventriculart node causes both atria to contract
Sinoatrial node
SA node sends an impulse for the atria to contract. AV node is then activated which contracts the ventricles.
The impulses from SA node spread through out the atrial musculature in about 0.09 seconds, and parallel to it, the impulses also reach the AV node. From AV node, after a delay of about 0.12 seconds they pass to the inter ventricular septum through the Bundle of His, which soon divides into Left and Right Bundle branch and ultimately into the Purkinje fibers which first depolarize the endocardium of the ventricles and then the rest of ventricular musculature. SA Node --> Atria, AV node --> Bundle of His --> Right & Left Bundle Branches --> Purkinje fibers
There is only one SA(sinoatrial) node. It is located by the right atrium of the heart. it initiates the nerve impulse which travels through both atria to initiate atrial contraction. Then the impulse travels to the AV(atrial ventricular) node. the nerve impulse travels through the intraventricular septum to the apex of the heart, where it initiates the contraction of the ventricles(starting from the apex and squeezing the blood up and out of the arteries).
It regulates a heartbeat in a weak heart by sending an electric charge at intervals to make it beat.
The Sinoatrial Node sends a wave of electric impulses through the heart, which causes both atria to contract.
The AV node slows down the impulse giving the atria time to contract before the ventricles contract.
Premature Ventricular Contractions
Atrio-ventricular valves