The atrioventricular bundle is also known as the bundle of His.
The atrioventricular bundle, more commonly referred to as the bundle of His, is a crucial component of the heart's electrical conduction system. It plays a vital role in ensuring the coordinated contraction of the heart chambers. Here's a more detailed look at its function:
Location and Function
The bundle of His is situated between the atria (upper chambers) and the ventricles (lower chambers) of the heart. It acts as a bridge, conducting electrical signals from the atrioventricular (AV) node to the ventricles, and ensuring that the ventricles contract in a synchronized manner after the atria have completed their contraction.
Importance in the Cardiac Cycle
- Electrical signals originate in the sinoatrial (SA) node, also known as the heart's natural pacemaker.
- The signals then travel to the AV node, where they are briefly delayed. This delay is crucial for allowing the atria to finish emptying their blood into the ventricles.
- From the AV node, the electrical impulse passes through the bundle of His.
- The bundle of His then divides into right and left bundle branches, which conduct the signals to the Purkinje fibers in the ventricles, causing them to contract.
- The coordinated contraction of the ventricles is essential for efficiently pumping blood out to the body and lungs.
Summary
| Feature | Description |
|---|---|
| Primary Name | Atrioventricular Bundle |
| Alternative Name | Bundle of His |
| Location | Between the atria and ventricles |
| Function | Transmits electrical signals from the AV node to the ventricles, facilitating synchronized ventricular contraction. |
In essence, the bundle of His is indispensable for the rhythmic and efficient pumping action of the heart.
