Final answer:
The electrical impulse travels to the AV node, which after a critical pause, passes the impulse to the atrioventricular bundle and then to the ventricles through the Purkinje fibers.
Step-by-step explanation:
As the electrical impulse travels to the Atrioventricular (AV) node, the next step in the electrical pathway of the heart is a critical pause before the AV node depolarizes. This delay is crucial for heart function as it allows the atria to complete their contraction and pump blood into the ventricles. The impulse then travels to the atrioventricular bundle (Bundle of His), followed by the bundle branches and the Purkinje fibers, which are responsible for the excitation and contraction of the ventricles.