What is the only means of normal conduction from the atrium to the ventricles?

What is the only means of normal conduction from the atrium to the ventricles?

• A. The bundle of His
• B. The AV node
• C. The Purkinje network
• D. The moderator band

Answer: (A)

Conduction from the atria to the ventricles is governed by the AV node as the main gateway. The impulse travels from atrial myocardium into the AV node, where it is deliberately slowed to allow the ventricles time to fill. From the AV node, the signal moves into the bundle of His, then splits into the right and left bundle branches and finally spreads through the Purkinje network to activate the ventricles. The bundle of His is the conduit after the AV node that carries the impulse toward the ventricles, not the entry point from the atria. The Purkinje network handles ventricular activation within the ventricles, while the moderator band is an anatomical feature inside the right ventricle and does not form part of the normal atrioventricular conduction pathway.

Conduction from the atria to the ventricles is governed by the AV node as the main gateway. The impulse travels from atrial myocardium into the AV node, where it is deliberately slowed to allow the ventricles time to fill. From the AV node, the signal moves into the bundle of His, then splits into the right and left bundle branches and finally spreads through the Purkinje network to activate the ventricles.

The bundle of His is the conduit after the AV node that carries the impulse toward the ventricles, not the entry point from the atria. The Purkinje network handles ventricular activation within the ventricles, while the moderator band is an anatomical feature inside the right ventricle and does not form part of the normal atrioventricular conduction pathway.