Heart block is the term meaning interruption of electrical impulses in the heart's conduction system.

Yes, the ECG records the electrical stimulation of the heart muscle by the conduction system and traces the movement of those impulses.

Fibers of the conduction system of the heart is called Purkinje fibers

four structures that compose the conduction of the heart

An aberrant conduction is a heart condition where the electrical stimulus travels via an abnormal pathway.