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Related Concept Videos

Conduction System of the Heart01:20

Conduction System of the Heart

The cardiac conduction system produces and transmits electrical impulses that prompt myocardial contraction, ensuring efficient heart function. This intricate system ensures that the heart beats in a coordinated and efficient manner, beginning with the atria and then the ventricles. The conduction system optimizes cardiac output by maintaining this precise sequence, which is crucial for adequate blood circulation.
This system relies on the unique properties of nodal and Purkinje cells:...
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...
Fetal Circulation01:14

Fetal Circulation

Fetal circulation is a unique system that facilitates the exchange of gases, nutrients, and waste products between the developing fetus and the mother. This intricate process takes place through a special organ called the placenta.
Two umbilical arteries transport blood from the fetus to the placenta. At the placenta, the blood absorbs oxygen and nutrients while simultaneously eliminating waste products. This oxygen-enriched and nutrient-rich blood then returns to the fetus through one...
Development of the Heart01:27

Development of the Heart

The development of the human heart, a crucial organ, commences from the mesoderm on the 18th or 19th day after fertilization. This process initiates in the cardiogenic area, a group of mesodermal cells at the embryo's head end, which evolves into elongated strands known as cardiogenic cords. These cords undergo a transformation to form hollow-centered endocardial tubes.
As the embryo undergoes lateral folding, these paired tubes approach each other, merging into a single primitive heart tube by...
Development of Blood Vessels01:07

Development of Blood Vessels

The development of the vascular system in a fetus is a complex and intricate process that begins as early as 15 to 16 days post-conception. This process starts outside the embryo, specifically in the mesoderm of the yolk sac, chorion, and connecting stalk. Approximately two days later, the formation of blood vessels occurs within the embryo itself.
The initial formation of this system is facilitated by the small amount of yolk present in the ovum and yolk sac. Blood vessels originate from...
Cardiomyopathy III: Hypertrophic Cardiomyopathy01:29

Cardiomyopathy III: Hypertrophic Cardiomyopathy

Hypertrophic cardiomyopathy, or HCM, is an autosomal dominant genetic disorder characterized by asymmetric left ventricular hypertrophy without ventricular dilation. It is more common in men and is typically diagnosed in young, athletic adults.EtiologyHCM is primarily genetic and is caused by mutations in genes encoding sarcomeric proteins. Researchers have identified over 1400 mutations across at least 11 different genes. Among these, the most frequently occurring mutations are found in the...

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Related Experiment Video

Updated: May 10, 2026

A Novel Ex Ovo Banding Technique to Alter Intracardiac Hemodynamics in an Embryonic Chicken System
08:09

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Published on: May 13, 2016

The conduction system in heterotaxy.

Hiromi Kurosawa1, Noriyasu Kawada

  • 1Sakakibara Sapia Tower Clinic, Tokyo Women's Medical University, Jikei University, Tokyo, Japan.

World Journal for Pediatric & Congenital Heart Surgery
|June 28, 2013
PubMed
Summary

Atriovisceral heterotaxy causes complex congenital heart disease, affecting the heart

Area of Science:

  • Cardiology
  • Developmental Biology
  • Medical Genetics

Background:

  • Atriovisceral heterotaxy represents a spectrum of complex congenital heart disease.
  • The conduction system's anatomy is frequently abnormal in these conditions.

Purpose of the Study:

  • To investigate the variability and complexity of the cardiac conduction system in atriovisceral heterotaxy.
  • To correlate conduction system abnormalities with structural cardiac defects.

Main Methods:

  • Review of cardiac imaging and pathology data from patients with atriovisceral heterotaxy.
  • Detailed analysis of conduction system location and morphology.
  • Correlation with the type and severity of structural cardiac anomalies.

Main Results:

Keywords:
arrhythmiacongenital heart diseaseheterotaxyisomerism

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  • The cardiac conduction system shows significant variability in position and structure in atriovisceral heterotaxy.
  • Abnormalities in the conduction system are directly related to the complexity and location of cardiac malformations.

Conclusions:

  • Understanding the conduction system's disposition is crucial for managing congenital heart disease in atriovisceral heterotaxy.
  • The findings provide insights into the developmental basis of these complex cardiac anomalies.