Definition

Noun: * A bundle of specialized cardiac muscle fibers: A distinct anatomical structure within the heart's electrical conduction system. It is a crucial pathway that transmits the electrical impulse from the atrioventricular node to the ventricles, initiating their contraction and coordinating the heartbeat.

Examples of Usage

• Noun:
  • The electrical signal travels from the AV node down the atrioventricular bundle to the ventricles.
  • Damage to the atrioventricular bundle can cause a heart block, disrupting the coordination between the atria and ventricles.
  • The atrioventricular bundle is also known as the bundle of His.

Advanced Usage

• Clinical Context: In cardiology, the term is used to describe the specific location of conduction system abnormalities. For example, "The ECG showed a delay in the atrioventricular bundle."
• Anatomical Description: Used in detailed anatomical or physiological explanations of the cardiac cycle. For example, "The impulse then enters the atrioventricular bundle, the only electrical connection between the atria and ventricles."

Variants and Related Words

• Bundle of His: The most common synonym and alternate name for the atrioventricular bundle.
• AV bundle: A common abbreviated form.
• Atrioventricular (AV) node: The structure that precedes the bundle in the conduction pathway.
• Purkinje fibers: The network of fibers that distribute the impulse from the bundle branches throughout the ventricular myocardium.

Synonyms

• Bundle of His
• AV bundle (abbreviation)

Related Phrases

• Atrioventricular bundle branch block: A condition where there is a delay or blockage in one of the two branches (right or left) that stem from the atrioventricular bundle.
• Conduction system of the heart: The broader system to which the atrioventricular bundle belongs.

Noun

1. a bundle of modified heart muscle that transmits the cardiac impulse from the atrioventricular node to the ventricles causing them to contract