<unk>  (AV block) is a disease of the electrical conduction system of the heart in which electrical impulses conduct from the cardiac atria to the ventricles through the<unk>  node (AV node) more slowly than normal.<unk>  degree AV block does not generally cause any symptoms, but may progress to more severe forms of heart block such as second- and third-degree<unk>  block. It is diagnosed using an electrocardiogram, and is defined as a PR interval greater than 200 milliseconds.<unk>  degree AV block affects 0.65-1.1% of the population with 0.13 new cases per 1000 persons each year.
First-degree atrioventricular block
Second-degree atrioventricular block
Third-degree atrioventricular block
Ventricular escape beat
AV nodal reentrant tachycardia
Wandering atrial pacemaker
Re-entry ventricular arrhythmia
Left bundle branch block