Definition

Noun: * Purkinje's system: A specialized network of cardiac muscle fibers (Purkinje fibers) that conducts the electrical impulse from the atrioventricular node through the ventricles of the heart, causing them to contract in a coordinated manner. It is a crucial part of the heart's electrical conduction system.

Usage

• The term is used in medical, anatomical, and physiological contexts to describe a specific anatomical structure and its function within the heart.
• It is a proper noun, often capitalized ("Purkinje's system" or "the Purkinje system").
• Example: "The electrical signal travels through the Purkinje's system to ensure the ventricles contract from the bottom upward, efficiently pumping blood out of the heart."

Examples

• "Damage to Purkinje's system can lead to serious cardiac conduction disorders."
• "The impulse propagation through Purkinje's system is remarkably fast."
• "Cardiologists study the function of Purkinje's system to understand certain types of arrhythmias."

Advanced Usage

• The term is synonymous with the Purkinje network or the subendocardial branches.
• It is a key component of the larger cardiac conduction system, which also includes the sinoatrial node, atrioventricular node, and bundle of His.

Variants and Related Words

• Purkinje fiber (n): An individual specialized cardiac muscle fiber that makes up the Purkinje system. These fibers are larger in diameter than ordinary cardiac muscle cells and conduct impulses rapidly.
• Purkinje network (n): Another name for Purkinje's system, emphasizing its interconnected, web-like structure.

Synonyms

• Purkinje network
• Subendocardial branches

Related Terms and Concepts

• Atrioventricular node (AV node) (n): The cluster of cells that delays and relays the cardiac impulse to the Purkinje system.
• Ventricle (n): One of the two large chambers of the heart that pump blood to the lungs and body; the structures activated by the Purkinje system.
• Cardiac conduction system (n): The entire system of specialized heart cells that generates and conducts electrical impulses, including the Purkinje system.

Noun

1. a network of Purkinje fibers that carry the cardiac impulse from the atrioventricular node to the ventricles of the heart and causes them to contract