atrioventricular node

Also found in: Thesaurus, Medical, Acronyms, Encyclopedia, Wikipedia.

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.

American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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.

[1930–35]

ThesaurusAntonymsRelated WordsSynonymsLegend:

Switch to new thesaurus

Noun

atrioventricular 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

Mentioned in ?

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.

Bisphenol A exposure and cardiac electrical conduction in excised rat hearts

The impulse reaches the atrioventricular node, where it's momentarily delayed before it spreads throughout the walls of the ventricles.

KNOW YOUR BODY... How the heart beats

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.

Role of Notch signaling in the mammalian heart

(3) Birds have a cardiac conduction system, similar to that of mammals, and consists of a sinoatrial node, an atrioventricular node, and Purkinje fibers.

Normal electrocardiogram patterns and values in Muscovy ducks (Cairina moschata)

The atrioventricular node is composed of fibers which resemble P-fiber more closely than the myocardial muscle fibers.

Distribution and structure of Purkinje fibers in the heart of ostrich (Struthio camelus) with the special references on the ultrastructure

A modified electrocardiographic algorithm for differentiating typical atrioventricular node reentrant tachycardia from atrioventricular reciprocating tachycardia mediated by concealed accessory pathway.

Targeting tachycardia: diagnostic tips and tools: many narrow QRS complex tachycardias are benign, but some require rapid intervention. The review, EKG strips, and algorithm you'll find here will help you get to the source of the problem without delay

CAG and EPS showed normal epicardial coronary arteries and atrioventricular node reentry (AVNRT), respectively; and slow pathway ablation was performed successfully.

Changes of high-sensitive troponin level in a patient with paroxysmal supraventricular tachycardia/Paroksismal supraventrikuler tasikardili bir hastada yuksek duyarli troponin duzeyindeki degisiklikler

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.

Mutation in gene critical for human development causes lethal arrhythmia

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.

HEART RATE VARIABILITY - A REVIEW

He was re-admitted in May 2007 with paroxysmal atrial fibrillation secondary to atrioventricular node re-entry tachycardia (AVNRT) requiring anticoagulation.

Nephrectomy in patients with Caroli's and ADPKD may be associated with increased morbidity

We describe the main features of the cystic tumor of the atrioventricular node (CTAVN), another pseudoneoplastic lesion that may cause sudden death.

Cystic tumor of the atrioventricular node: a rare cardiac pseudoneoplastic lesion

The electrical conduction system of the heart may have a bypass tract or a dual atrioventricular node which allows for reentry to occur.