Related Experiment Video
Updated: Jan 21, 2026
Optical Mapping of Action Potentials and Calcium Transients in the Mouse Heart
Published on: September 13, 2011
Simulation of action potential propagation based on the ghost structure method
Yongheng Wang1, Li Cai2,3, Xiaoyu Luo4
1NPU-UoG International Cooperative Lab for Computation and Application in Cardiology, Northwestern Polytechnical University, Xi'an, 710129, China. wangyongheng91@mail.nwpu.edu.cn.
A novel ghost structure (GS) method accurately simulates cardiac electrical activity in complex heart models. This approach aids in understanding conditions like left bundle branch block (LBBB) and their impact on heart contraction.
Area of Science:
- Computational Biology
- Biophysics
- Numerical Analysis
Background:
- Simulating cardiac electrophysiology requires accurate models for irregular domains.
- Existing methods often necessitate complex grid regeneration.
Purpose of the Study:
- To introduce and validate a ghost structure (GS) method for monodomain model simulation.
- To assess the impact of left bundle branch block (LBBB) on cardiac action potential propagation and contraction.
Main Methods:
- Developed a ghost structure (GS) method using finite difference for irregular domains.
- Validated the GS method with the Fitzhugh-Nagumo monodomain model in various regions and states.
- Simulated action potential (AP) propagation in healthy and LBBB human heart models.
Main Results:
- The GS method accurately simulates AP propagation in stationary and moving irregular domains.
- LBBB was shown to delay left ventricular contraction relative to the right ventricle.
- Simulations revealed altered AP and calcium dynamics under LBBB conditions.
Conclusions:
- The ghost structure (GS) method provides an efficient and accurate tool for cardiac electrophysiology simulations.
- LBBB significantly disrupts synchronized ventricular contraction, impacting overall cardiac function.
More Related Videos
15:05Deciphering the Structural Effects of Activating EGFR Somatic Mutations with Molecular Dynamics Simulation
Published on: May 20, 2020
09:17Structure-Based Simulation and Sampling of Transcription Factor Protein Movements along DNA from Atomic-Scale Stepping to Coarse-Grained Diffusion
Published on: March 1, 2022
Related Concept Videos
01:23Propagation of Action Potentials
Neurons (nerve cells) have a resting membrane potential, with a slightly negative charge inside compared to outside. This is maintained by ion channels, such as sodium (Na+) and potassium (K+) channels, which control the flow of ions. When a stimulus, like a touch or a signal from another neuron, triggers the neuron, sodium channels open, allowing sodium ions to...
01:31Action Potential
Membrane potential in neurons
Neurons typically have a resting membrane potential of about -70 millivolts (mV). When they receive...
01:14Action Potential
Membrane potential in neurons
Neurons typically have a resting membrane potential of about -70 millivolts (mV). When they receive...
01:41Action Potentials
01:30Cardiac Action Potential
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
01:28Action Potential: Phases of Stimulation
Resting Phase:
In this phase, the cell's membrane is at its resting potential, typically around -70 millivolts (mV) for neurons. Inside the cell, there is a higher concentration of potassium ions (K+) and a lower concentration of sodium ions (Na+). Voltage-gated sodium channels are closed, and...