Atrioventricular node

E432889

cardiac conduction structure component of the cardiac conduction system specialized cardiac tissue

The atrioventricular node is a specialized cluster of cardiac cells that relays and delays electrical impulses between the atria and ventricles to coordinate the heart’s rhythm.

Try in SPARQL Jump to: Surface forms Disambiguation Statements Elicitation Referenced by

All labels observed (3)

Label	Occurrences
AV node	1
Atrioventricular node canonical	1
atrioventricular node	1

How this entity was disambiguated

This entity first appeared as the object of triple T4332163 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.

NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07

Target entity: Atrioventricular node
Context triple: [Heart, hasPart, Atrioventricular node]

A. Sinoatrial node
The sinoatrial node is the heart’s natural pacemaker, a specialized cluster of cells that initiates and regulates the heartbeat by generating electrical impulses.
B. Atrial septum
The atrial septum is the wall of tissue that separates the heart’s left and right atria, helping maintain proper direction and separation of blood flow between them.
C. Purkinje fibers
Purkinje fibers are specialized cardiac muscle fibers that rapidly conduct electrical impulses through the ventricles, coordinating their synchronized contraction.
D. Tricuspid valve
The tricuspid valve is one of the heart’s four valves that regulates blood flow between the right atrium and right ventricle, preventing backflow during ventricular contraction.
E. Right ventricle
The right ventricle is one of the heart’s four chambers that pumps deoxygenated blood to the lungs via the pulmonary artery.
F. None of above. chosen
G. Unsure - the case is ambiguous/there is not enough information to decide.

NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07

Target entity: Atrioventricular node
Target entity description: The atrioventricular node is a specialized cluster of cardiac cells that relays and delays electrical impulses between the atria and ventricles to coordinate the heart’s rhythm.

A. Sinoatrial node
The sinoatrial node is the heart’s natural pacemaker, a specialized cluster of cells that initiates and regulates the heartbeat by generating electrical impulses.
B. Atrial septum
The atrial septum is the wall of tissue that separates the heart’s left and right atria, helping maintain proper direction and separation of blood flow between them.
C. Purkinje fibers
Purkinje fibers are specialized cardiac muscle fibers that rapidly conduct electrical impulses through the ventricles, coordinating their synchronized contraction.
D. Tricuspid valve
The tricuspid valve is one of the heart’s four valves that regulates blood flow between the right atrium and right ventricle, preventing backflow during ventricular contraction.
E. Right ventricle
The right ventricle is one of the heart’s four chambers that pumps deoxygenated blood to the lungs via the pulmonary artery.
F. None of above. chosen

Statements (48)

Predicate	Object
instanceOf	cardiac conduction structure ⓘ component of the cardiac conduction system ⓘ specialized cardiac tissue ⓘ
associatedWithCondition	AV nodal block ⓘ atrioventricular nodal reentrant tachycardia ⓘ first-degree atrioventricular block ⓘ second-degree atrioventricular block ⓘ third-degree atrioventricular block ⓘ
bloodSupply	atrioventricular nodal artery ⓘ left circumflex artery ⓘ right coronary artery ⓘ
canBeDamagedBy	cardiac surgery ⓘ myocardial infarction ⓘ
canBeTargetOf	catheter ablation ⓘ
clinicalRelevance	key site for control of ventricular rate in atrial fibrillation ⓘ
composedOf	slow-response cardiac myocytes ⓘ specialized nodal cells ⓘ
correspondsToECGComponent	PR interval ⓘ
developsFrom	embryonic atrioventricular canal region ⓘ
ensures	completion of atrial contraction before ventricular contraction ⓘ
foundIn	mammals ⓘ
function	coordinates atrial and ventricular contraction timing ⓘ delays conduction of cardiac impulses ⓘ electrical relay between atria and ventricles ⓘ
hasProperty	automaticity ⓘ decremental conduction ⓘ slow conduction velocity ⓘ
hasSynonym	AV node ⓘ linked to: Atrioventricular node atrioventricular junctional tissue ⓘ
innervatedBy	parasympathetic fibers ⓘ sympathetic fibers ⓘ
locatedIn	interatrial septum ⓘ right atrium ⓘ
locatedNear	opening of the coronary sinus ⓘ septal leaflet of the tricuspid valve ⓘ
modulatedBy	autonomic nervous system ⓘ
parasympatheticEffect	slows AV nodal conduction ⓘ
partOf	cardiac conduction system ⓘ heart ⓘ
prevents	1:1 conduction of very fast atrial arrhythmias ⓘ excessively rapid conduction from atria to ventricles ⓘ
receivesImpulseFrom	atrial myocardium ⓘ sinoatrial node ⓘ linked to: Sinoatrial node
sendsImpulseTo	atrioventricular bundle ⓘ bundle of His ⓘ
species	human ⓘ
sympatheticEffect	increases AV nodal conduction ⓘ
typicalDelay	about 0.1 seconds ⓘ

How these facts were elicited

Referenced by (3)

Full triples — surface form annotated when it differs from this entity's canonical label.

Heart → hasPart → Atrioventricular node ⓘ

Sinoatrial node → connectedTo → atrioventricular node ⓘ

linked to: Atrioventricular node

Atrioventricular node → hasSynonym → AV node ⓘ