Atrioventricular bundle

Atrioventricular Bundle

The atrioventricular bundle (AV bundle), also known as the bundle of His, is a key component of the cardiac conduction system. It plays a crucial role in the electrical conduction system of the heart by transmitting electrical impulses from the atrioventricular node (AV node) to the ventricles of the heart.

Anatomy

The atrioventricular bundle is located in the septum of the heart, beginning at the AV node and extending down to the apex of the heart. It is composed of cardiac muscle cells and is the only electrical connection between the atria and the ventricles.

Function

The primary function of the atrioventricular bundle is to transmit electrical impulses from the AV node to the ventricles. This ensures that the ventricles contract after the atria, which is necessary for efficient pumping of blood from the heart to the rest of the body.

Clinical Significance

Disorders of the atrioventricular bundle, such as bundle branch block or heart block, can disrupt the normal rhythm of the heart and lead to a variety of symptoms, including palpitations, dizziness, and syncope. These conditions are typically diagnosed through an electrocardiogram (ECG) and can often be treated with medication or a pacemaker.

See Also

• Cardiac conduction system
• Atrioventricular node
• Bundle branch block
• Heart block