A<unk>  refers to a defect of the heart's electrical conduction system below the level of the AV node. Depending upon the level and location of the<unk> /defect in the conducting pathway<unk>  can be classified into left<unk>  and right<unk> .
Bundle branch block
Right bundle branch block
Left bundle branch block
Fascicular VT
Sinoatrial block
Atrioventricular dissociation
Pre-excitation syndrome
Sinoatrial arrest