<unk>  (AV block) is a disease of the electrical conduction system of the heart. It is a conduction block between the atria and ventricles. The presence of<unk><unk>  AV block is diagnosed when one or more (but not all) of the atrial impulses fail to conduct to the ventricles due to impaired conduction. It is classified as a block of the AV node and is categorized in between first-degree (slowed conduction) and third<unk>  blocks (complete block).
Second-degree atrioventricular block
Third-degree atrioventricular block
First-degree atrioventricular block
Ventricular escape beat
AV nodal reentrant tachycardia
Wandering atrial pacemaker
Re-entry ventricular arrhythmia
Junctional ectopic tachycardia