Related Experiment Video

Updated: Jul 26, 2025

Author Spotlight: Advancing Human Cardiac Anatomy Through Multi-Scale Analysis of Hearts
04:22

Author Spotlight: Advancing Human Cardiac Anatomy Through Multi-Scale Analysis of Hearts

Published on: June 28, 2024

514

Anatomy and Pathology of the Cardiac Conduction System

Roshan Karki1, Anvi Raina1, Fatima M Ezzeddine1

  • 1Department of Cardiovascular Medicine, Mayo Clinic College of Medicine, Rochester, MN 55905, USA.

Cardiology Clinics
|June 15, 2023
PubMed

Insights

This review details the cardiac conduction system

Area of Science:

  • Cardiovascular Science
  • Cardiac Electrophysiology
  • Human Anatomy

Background:

  • The cardiac conduction system comprises specialized tissues critical for heart rhythm.
  • Understanding its anatomy and pathology is essential for treating arrhythmias and heart failure.

Purpose of the Study:

  • To summarize the normal and developmental anatomy of the cardiac conduction system.
  • To review variations, congenital anomalies, and pathology of the conduction system.
  • To provide clinical insights for interventional electrophysiologists.

Main Methods:

  • Literature review of cardiac conduction system anatomy, development, and pathology.
  • Synthesis of information on normal variations and congenital anomalies.
  • Identification of clinical pearls for proceduralists.

Main Results:

  • Detailed summary of the cardiac conduction system's structure and development.
  • Overview of anatomical variations and congenital abnormalities.
  • Discussion of key pathologies and their clinical relevance.

Conclusions:

  • A comprehensive understanding of the cardiac conduction system is vital for electrophysiologists.
  • This review offers essential knowledge for safe and effective ablation and device therapy.
  • Clinical pearls are provided to aid in managing cardiac arrhythmias and heart failure.

Keywords:
Atrioventricular nodeHis bundleLeft bundlePurkinje fibersRight bundleSinus node

More Related Videos

Whole-Mount Immunofluorescence Staining, Confocal Imaging and 3D Reconstruction of the Sinoatrial and Atrioventricular Node in the Mouse05:16

Whole-Mount Immunofluorescence Staining, Confocal Imaging and 3D Reconstruction of the Sinoatrial and Atrioventricular Node in the Mouse

Published on: December 22, 2020

5.7K
Preclinical Cardiac Electrophysiology Assessment by Dual Voltage and Calcium Optical Mapping of Human Organotypic Cardiac Slices09:35

Preclinical Cardiac Electrophysiology Assessment by Dual Voltage and Calcium Optical Mapping of Human Organotypic Cardiac Slices

Published on: June 16, 2020

10.0K

Related Concept Videos

Conduction System of the Heart01:19

Conduction System of the Heart

Autorhythmicity is a term that refers to the heart's inherent ability to generate electrical signals and instigate muscle contractions. This self-regulating conduction system within the heart consists of two key components: the pacemaker cells and specialized conducting cells.
The pacemaker cells are located in two primary nodes: the sinoatrial (SA) node and the atrioventricular (AV) node. The SA node pacemaker cells can autonomously depolarize, triggering an action potential that leads to the...
9.3K
Electrophysiology of Normal Cardiac Rhythm01:19

Electrophysiology of Normal Cardiac Rhythm

The normal cardiac rhythm is a synchronized electrical activity that facilitates the regular and coordinated contraction of the heart muscle. This process is essential for efficient blood circulation throughout the body. The fundamental elements involved in establishing and maintaining this rhythm include the unique electrical properties of cardiac muscle cells, the sinoatrial (SA) node's pacemaker function, the specialized conducting system, and the ionic mechanisms underlying each phase...
6.6K
Cardiac Action Potential01:30

Cardiac Action Potential

Cardiac action potentials are essential for proper heart function, enabling the rhythmic contractions needed for adequate blood circulation. Nodal cells and Purkinje fibers, specialized for electrical conduction, generate these action potentials.
The cardiac action potential process involves a series of phases characterized by the movement of ions across the cardiac cell membranes, leading to the depolarization and repolarization of the cardiac myocytes.
Ionic Basis of Cardiac Action Potentials
1.8K
Mechanism of Cardiac Arrhythmias01:28

Mechanism of Cardiac Arrhythmias

Arrhythmias are irregular heart rhythms occurring when the heart's electrical impulses become abnormal. These disturbances can lead to various symptoms, depending on their severity and the underlying cause. Some common factors contributing to arrhythmias include hypoxia, ischemia, electrolyte imbalances, excessive catecholamine exposure, drug toxicity, and muscle overstretching. Arrhythmias can be classified into two main types based on the rate and site of origin of abnormal heart rhythms.
968
Pathophysiology of Cardiac Performance01:29

Pathophysiology of Cardiac Performance

Typical heart performance is influenced by heart rate, rhythm, myocardial contraction, and metabolism or blood flow. The cardiac muscle exhibits distinct electrophysiological features, including pacemaker activity and calcium channel control, which play a vital role in the heart's response to various drugs. The autonomic nervous system, comprising the sympathetic and parasympathetic branches, regulates heart rate. Sympathetic activation increases heart rate, while parasympathetic activation...
712
Structure of Cardiac Muscles01:13

Structure of Cardiac Muscles

Cardiac muscle, or myocardium, is a specialized type of muscle found exclusively in the heart. Its unique structural and functional characteristics enable the heart to perform its vital role of pumping blood throughout the body continuously and rhythmically. The cardiac muscle cells, or cardiomyocytes, possess an endomysium and perimysium but do not have an epimysium.
Compared to skeletal muscles, cardiac muscle cells are small and mostly have a single nucleus. Additionally, they are usually...
13.5K