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Related Experiment Video

Updated: Jul 9, 2026

High-resolution Optical Mapping of the Mouse Sino-atrial Node
11:07

High-resolution Optical Mapping of the Mouse Sino-atrial Node

Published on: December 2, 2016

Computer three-dimensional reconstruction of the sinoatrial node.

H Dobrzynski1, J Li, J Tellez

  • 1University of Leeds, Leeds LS2 9JT, UK. bmshd@leeds.ac.uk

Circulation
|February 9, 2005
PubMed
Summary

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Researchers developed the first 3D mathematical model of the sinoatrial node (SAN), revealing a specialized interface between the SAN and atrial muscle crucial for heart pacemaking. This detailed virtual heart model enhances understanding of cardiac electrophysiology.

Area of Science:

  • Computational biology
  • Cardiac electrophysiology
  • Biophysics

Background:

  • Existing virtual heart models lack sinoatrial node (SAN) representation.
  • Theoretical models suggest electrical coupling gradients and cell interdigitation are vital for SAN function.
  • A comprehensive SAN model is needed for accurate virtual heart simulations.

Purpose of the Study:

  • To construct a 3D anatomically detailed mathematical model of the sinoatrial node (SAN).
  • To investigate the cellular composition and electrical properties of the SAN.
  • To characterize the interface between the SAN and atrial muscle.

Main Methods:

  • Histological staining of rabbit SAN preparations for cell typing.
  • Molecular analysis (mRNA and protein expression) of SAN and atrial cells.

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

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Microelectrode Array Recording of Sinoatrial Node Firing Rate to Identify Intrinsic Cardiac Pacemaking Defects in Mice
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Microelectrode Array Recording of Sinoatrial Node Firing Rate to Identify Intrinsic Cardiac Pacemaking Defects in Mice

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Related Experiment Videos

Last Updated: Jul 9, 2026

High-resolution Optical Mapping of the Mouse Sino-atrial Node
11:07

High-resolution Optical Mapping of the Mouse Sino-atrial Node

Published on: December 2, 2016

Whole-Mount Immunofluorescence Staining, Confocal Imaging and 3D Reconstruction of the Sinoatrial and Atrioventricular Node in the Mouse
05:16

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

Published on: December 22, 2020

Microelectrode Array Recording of Sinoatrial Node Firing Rate to Identify Intrinsic Cardiac Pacemaking Defects in Mice
09:20

Microelectrode Array Recording of Sinoatrial Node Firing Rate to Identify Intrinsic Cardiac Pacemaking Defects in Mice

Published on: July 5, 2021

  • Construction of a 2.5-million-element array model incorporating identified cell types.

    • Main Results:

    • Identified multiple cell types (SAN cells, atrial cells, fibroblasts, adipocytes) within and around the SAN.
    • Differentiated two SAN cell types: central pacemaker cells (small, mesh-like, Cx43-negative) and peripheral cells (large, parallel, Cx43-positive).
    • All SAN cells expressed middle neurofilament, unlike atrial cells.

    Conclusions:

    • Successfully constructed the first 3D anatomically detailed mathematical model of the SAN.
    • Demonstrated a specialized interface between the SAN and atrial muscle.
    • The model provides a foundation for understanding SAN pacemaking and atrial activation.