atrioventricular node

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atrioventricular node

A small mass of specialized cardiac muscle fibers, located in the wall of the right atrium of the heart, that receives electrical impulses from the sinoatrial node and directs them to the conduction system in the walls of the ventricles. Also called A-V node.

a′trioventric′ular node`

a small mass of conducting muscle fibers in the heart, at the base of the right atrium, that transmits heartbeat impulses to the ventricles.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.atrioventricular node - a node of specialized heart muscle located in the septal wall of the right atriumatrioventricular node - 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
cardiac muscle, heart muscle - the muscle tissue of the heart; adapted to continued rhythmic contraction
References in periodicals archive ?
Cystic tumor of the atrioventricular node of the heart appears to be the heart equivalent of the solid cell nests (ultimobranchial rests) ofthe thyroid.
The impulse reaches the atrioventricular node, where it's momentarily delayed before it spreads throughout the walls of the ventricles.
Knowing which vessel is occluded before percutaneous coronary intervention can help in planning the procedure and recognizing when patients are at high risk for disturbances in conduction at the atrioventricular node.
Presumably, a nutrient branch distal to this segmental stenosis at least partially supplied the atrioventricular node in this patient.
Saxitoxin blocks sodium channels in nerve and muscle, which arrests impulse conduction and can suppress atrioventricular node conduction.
Women who are positive for anti-SSA/Ro and anti-SSB/La autoantibodies have a baseline 2% chance that fibrosis of the atrioventricular node and heart block will develop in the fetus, but that risk increases 10-fold if they have had a previous child with either heart block or a facial rash, she said.
08 seconds for the impulse to travel through the atria making them contract and then the impulse goes to the next major electrical point of the heart called the atrioventricular node (AV node).
The atrioventricular node (NAV) of moose has a rastriform configuration 10-12 mm long, 2.

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