Nature

Development of the Cardiac Conduction System in Atrioventricular Septal Defect in Human Trisomy 21

In patients with atrioventricular septal defect (AVSD), the occurrence of nonsurgical AV block has been reported. We have looked for an explanation in the development of the AV conduction system.
National Institute for Health and Care Excellence

Dual‑chamber pacemakers for symptomatic bradycardia due to sick sinus syndrome and/or atrioventricular block

2.1 Abnormal heart rhythms (dysrhythmias) are caused by disturbances in electrical impulse generation or by abnormal conduction between chambers of the heart – principally within the sinus node, ...
Healio

Atrioventricular Node (AV Node)

The atrioventricular node (AV Node) is a bundle of conduction cells that regulate the communication of atrial electrical activity with ventricular electrical activity. The AV node has a long ...
Nature

The total absence of atrial automaticity in a child with sinus node dysfunction

Background A routine sports evaluation identified constant alternation between a junctional and idioventricular rhythm in a 9-year-old child. During exercise testing, electrography demonstrated that ...