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Definition of Atrioventricular node

Atrioventricular node Definition from Language, Idioms & Slang Dictionaries & Glossaries
WordNet 2.0

1. a node of specialized heart muscle located in the septal wall of the right atrium; receives impulses from the sinoatrial node and transmits them to atrioventricular bundle
(hypernym) cardiac muscle, heart muscle
Atrioventricular node Definition from Medicine Dictionaries & Glossaries
Aging Hearts and Arteries Glossary
A group of special conduction fibers at the base of the wall between the right atrium and ventricle. They relay the electrical impulses to the ventricle to initiate contraction. These electrical impulses originate in the heart’s pacemaker, the sinoatrial node within the right atrium.
Source: National Institute on Aging
Dictionary of Medicine (Shahram)
referring to the atria and ventricles
atrioventricular bundle or AV bundle or bundle of His = bundle of modified cardiac muscle which conducts impulses from the atrioventricular node to the septum and then divides to connect with the ventricles
atrioventricular groove = groove round the outside of the heart, showing the division between the atria and ventricles
atrioventricular node or AV node = mass of conducting tissue in the right atrium, which continues as the bundle of His and passes impulses from the atria to the ventricles
Atrioventricular node Definition from Encyclopedia Dictionaries & Glossaries
English Wikipedia - The Free Encyclopedia
The atrioventricular (AV) node is a part of the electrical conduction system of the heart that coordinates the top of the heart. It electrically connects atrial and ventricular chambers. The AV node is an area of specialized tissue between the atria and the ventricles of the heart, 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). 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.

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