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Electrophysiology of Normal Cardiac Rhythm

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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...

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Updated: Jun 5, 2025

Author Spotlight: Understanding Mechanical Forces Involved in Shaping the Zebrafish Heart

Author Spotlight: Understanding Mechanical Forces Involved in Shaping the Zebrafish Heart

Published on: January 3, 2025

Rhythmic forces shaping the zebrafish cardiac system.

Hajime Fukui¹, Renee Wei-Yan Chow², Choon Hwai Yap³

¹Institute of Advanced Medical Sciences, Tokushima University, Tokushima, Japan; Department of Cell Biology, National Cerebral and Cardiovascular Center Research Institute, Osaka, Japan.

Trends in Cell Biology

|December 12, 2024

Summary

This summary is machine-generated.

Mechanical forces from rhythmic heart contractions are crucial for heart development. This review explores how these physical stimuli influence cardiac cell identity and tissue mechanics in zebrafish.

Keywords:

Danio rerio cardiac valve endothelial to mesenchymal transition finite element modeling tissue mechanics trabeculation

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Heart Dissection in Larval, Juvenile and Adult Zebrafish, Danio rerio

Heart Dissection in Larval, Juvenile and Adult Zebrafish, Danio rerio

Published on: September 30, 2011

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Last Updated: Jun 5, 2025

Author Spotlight: Understanding Mechanical Forces Involved in Shaping the Zebrafish Heart

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Heart Dissection in Larval, Juvenile and Adult Zebrafish, Danio rerio

Heart Dissection in Larval, Juvenile and Adult Zebrafish, Danio rerio

Published on: September 30, 2011

Area of Science:

Developmental Biology
Biophysics
Cardiovascular Research

Background:

Heart development relies on mechanical forces generated by rhythmic contractions.
Cardiac cells sense and respond to physical stimuli during morphogenesis.
In vivo, cells encounter dynamic stresses throughout embryonic development.

Purpose of the Study:

To review the impact of mechanical forces on heart morphogenesis.
To explore the role of endocardial and myocardial cells in responding to these forces.
To provide an overview of forces and tissue mechanics in zebrafish cardiac development.

Main Methods:

Literature review of studies on zebrafish (Danio rerio) heart development.
Focus on the interplay between mechanical forces and cardiac cell identity.
Analysis of tissue mechanics and cellular responses to physical stimuli.

Main Results:

Mechanical forces are essential regulators of cardiac morphogenesis.
Endocardial cells (EdCs) and cardiomyocytes (CMs) are key responders to mechanical cues.
Zebrafish models provide insights into force-dependent cardiac development.

Conclusions:

Mechanical forces significantly influence cardiac cell identity and function.
Understanding these forces is critical for comprehending heart development.
Zebrafish serve as a valuable model for studying mechanobiology in the heart.