The AV node has a long refractory period allowing it to “block” conduction to the His-purkinje system of the ventricles if there are excessive atrial depolarizations as in atrial fibrillation ...

Because intrinsic conduction disease of the His-Purkinje system is the cause of 3 rd degree AV block (not autonomic tone or AV blocking medications), the rhythm is usually irreversible and a ...

The impulse is then passed to another node within the heart – the atrioventricular node (AVN). This node is in the lower part of the right atrium.

Less than 5% of patients developed first-degree AV block or intraventricular conduction defect and the occurrence of side effects was not related to dose. [23] In our study, propafenone-related AV ...

New research highlights postnatal regeneration limits and pathological remodeling of the cardiac conduction system after myocardial ... ventricular fibrillation, atrioventricular block, and ...

First-degree atrioventricular block is typically ... PR prolongation may warrant follow-up for signs of developing conduction system disease.” ...

All patients were monitored continuously until they had improved AV conduction or received an implanted PM. Recurrent cases were identified by routine electrocardiogram (ECG) that was obtained ...