Bundle of His

Definition

The bundle of His is a group of specialized heart muscle cells that transmit electrical impulses from the atrioventricular (AV) node to the ventricles. It's crucial for coordinating the heartbeat.

5 Must Know Facts For Your Next Test

1. The bundle of His is located in the interventricular septum.
2. It plays a key role in maintaining synchronized contractions of the heart chambers.
3. Disruption in the bundle of His can lead to arrhythmias or heart block.
4. The bundle branches into right and left pathways to supply both ventricles.
5. Pharmacological agents affecting the AV node can indirectly impact the function of the bundle of His.

Review Questions

• Where is the bundle of His located?
• How does the bundle of His contribute to heart function?
• What could be a potential consequence if there is damage to the bundle of His?

Related terms

Atrioventricular (AV) Node: A part of the electrical conduction system that delays impulses before passing them to the ventricles.

Purkinje Fibers: Specialized conductive fibers that distribute electrical impulses throughout the ventricles.

Arrhythmia: An abnormal rhythm of the heart often caused by issues with electrical impulse conduction.