# Summary About Conduction System Of The Heart

## Summary About Electrical conduction system of the heart

From the diagram above, you can see that the electrical signal in the heart

• begins at the SA Node

• stimulates the atria to contract

• travels to the AV Node

• travels to the Bundle of His

• travels through the Purkinje network

• stimulates the ventricles to contract

Note also that

• when the ventricles are being stimulated to contract, the atria are repolarizing

• the ventricles are repolarized during the T wave

• the normal pacemaker of the heart is the SA node

The location of the SA Node, AV Node, Bundle of His and Purkinje fibers are shown in the diagram below.