atrioventricular node


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atrioventricular node

n.
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`


n.
a small mass of conducting muscle fibers in the heart, at the base of the right atrium, that transmits heartbeat impulses to the ventricles.
[1930–35]
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 ?
Ion channel and exchange currents in single myocytes isolated from the rabbit atrioventricular node. Can J Cardiol 13(12):1175-1182.
The impulse reaches the atrioventricular node, where it's momentarily delayed before it spreads throughout the walls of the ventricles.
Of interest, Notch signaling regulates cardiac conduction system function, in particular the atrioventricular node. Inhibition of Notch signaling impedes the normal development of the atrioventricular node.
(3) Birds have a cardiac conduction system, similar to that of mammals, and consists of a sinoatrial node, an atrioventricular node, and Purkinje fibers.
The atrioventricular node is composed of fibers which resemble P-fiber more closely than the myocardial muscle fibers.
A modified electrocardiographic algorithm for differentiating typical atrioventricular node reentrant tachycardia from atrioventricular reciprocating tachycardia mediated by concealed accessory pathway.
CAG and EPS showed normal epicardial coronary arteries and atrioventricular node reentry (AVNRT), respectively; and slow pathway ablation was performed successfully.
When this happens, it can impair the electrical signal in the sinoatrial node and block the atrioventricular node, which conducts electrical signals from the atria to the ventricles.
the effect of epinephrine and norepinephrine released from sympathetic nerve fibres, acting on the sino-atrial and atrioventricular nodes, which increase the rate of cardiac contraction and facilitate conduction at the atrioventricular node and parasympathetic mediators of HR i.e.
He was re-admitted in May 2007 with paroxysmal atrial fibrillation secondary to atrioventricular node re-entry tachycardia (AVNRT) requiring anticoagulation.
We describe the main features of the cystic tumor of the atrioventricular node (CTAVN), another pseudoneoplastic lesion that may cause sudden death.
The electrical conduction system of the heart may have a bypass tract or a dual atrioventricular node which allows for reentry to occur.

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