Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Mechanism of Cardiac Arrhythmias01:28

Mechanism of Cardiac Arrhythmias

1.8K
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.
1.8K
ECG Interpretation of Arrhythmias I: Sinus Arrhythmias01:16

ECG Interpretation of Arrhythmias I: Sinus Arrhythmias

818
Arrhythmias are disturbances in the heart's rhythm that lead to abnormal heartbeats. These irregularities can originate from different parts of the heart and are classified based on their origin and nature.
Types of Arrhythmias
Sinus Node Arrhythmias
Sinus Bradycardia: Originating from the sinoatrial (SA) node, sinus bradycardia involves slower impulses, resulting in a heart rate of less than 60 beats per minute (bpm). Causes include sleep, vagal stimulation, beta-blockers, hypothyroidism,...
818
Conservation of Small Populations02:04

Conservation of Small Populations

17.1K
Small population sizes put a species at extreme risk of extinction due to a lack of variation, and a consequent decrease in adaptability. This weakens the chances of survival under pressures such as climate change, competition from other species, or new diseases. Large populations are more likely to survive pressures such as these, as such populations are more likely to harbor individuals that have genetic variants that are adaptive under new stresses. Small populations are much less...
17.1K
ECG Interpretation of Arrhythmias II: Atrial, Junctional and Ventricular Arrhythmias01:25

ECG Interpretation of Arrhythmias II: Atrial, Junctional and Ventricular Arrhythmias

533
Arrhythmia is a condition characterized by an irregular heart rhythm, with ECG changes that differ based on its origin and nature. The types of arrhythmias discussed below include atrial, junctional, and ventricular arrhythmias.Atrial ArrhythmiasPremature Atrial Complexes (PACs): PACs are early atrial beats caused by stress, caffeine, alcohol, electrolyte imbalances, hypoxia, hyperthyroidism, or certain medications (e.g., bronchodilators and decongestants). The ECG shows early P waves with an...
533
Predicting Molecular Geometry02:27

Predicting Molecular Geometry

45.7K
VSEPR Theory for Determination of Electron Pair Geometries
45.7K
What is Population Genetics?01:25

What is Population Genetics?

64.7K
A population is composed of members of the same species that simultaneously live and interact in the same area. When individuals in a population breed, they pass down their genes to their offspring. Many of these genes are polymorphic, meaning that they occur in multiple variants. Such variations of a gene are referred to as alleles. The collective set of all the alleles within a population is known as the gene pool.
64.7K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Sex-specific virtual population for the prediction and assessment of arrhythmia risk.

Europace : European pacing, arrhythmias, and cardiac electrophysiology : journal of the working groups on cardiac pacing, arrhythmias, and cardiac cellular electrophysiology of the European Society of Cardiology·2026
Same author

Modes of onset of ventricular arrhythmias in J-wave syndromes: mechanistic insights from computational modeling.

American journal of physiology. Heart and circulatory physiology·2026
Same author

Methadone Blockade of Inward Rectifier Potassium Current Promotes Both Early and Delayed Repolarization Arrhythmias: Mechanistic Insights From Computational Modeling.

Journal of the American Heart Association·2025
Same author

Ultrastructure and cardiac impulse propagation: scaling up from microscopic to macroscopic conduction.

The Journal of physiology·2024
Same author

One-year real-world experience with mavacamten and its physiologic effects on obstructive hypertrophic cardiomyopathy.

Frontiers in cardiovascular medicine·2024
Same author

Curvature-mediated source and sink effects on the genesis of premature ventricular complexes in long QT syndrome.

American journal of physiology. Heart and circulatory physiology·2024
Same journal

Decreasing Microtubule Detyrosination Improves Cardiac Mechanics and Sodium Channel Function in Arrhythmogenic Cardiomyopathy.

Circulation. Arrhythmia and electrophysiology·2026
Same journal

cAMP-Activated EPAC Signaling Is an Integral Component of Cardiac Pacemaker Cell Automaticity.

Circulation. Arrhythmia and electrophysiology·2026
Same journal

Feasibility of Two-Dimensional Speckle-Tracking Echocardiography for Assessing Ablation Complexity in Left Ventricular Outflow Tract Premature Ventricular Contractions.

Circulation. Arrhythmia and electrophysiology·2026
Same journal

Interpretable Multimodal AI to Predict the Presence of Late Gadolinium Enhancement on Cardiac Magnetic Resonance Imaging in Cardiac Sarcoidosis Patients.

Circulation. Arrhythmia and electrophysiology·2026
Same journal

Electrophysiological Effects of Right and Left Tragus Nerve Stimulation in Humans.

Circulation. Arrhythmia and electrophysiology·2026
Same journal

Simplified Tools, Complex Decisions: These Are Rhythm Procedures: Why AF Ablation, Leadless Pacing, and Left Atrial Appendage Occlusion Require Rhythm-Centered Care.

Circulation. Arrhythmia and electrophysiology·2026
See all related articles

Related Experiment Video

Updated: Jan 29, 2026

Methods for ECG Evaluation of Indicators of Cardiac Risk, and Susceptibility to Aconitine-induced Arrhythmias in Rats Following Status Epilepticus
08:28

Methods for ECG Evaluation of Indicators of Cardiac Risk, and Susceptibility to Aconitine-induced Arrhythmias in Rats Following Status Epilepticus

Published on: April 5, 2011

18.2K

Population Modeling Approach for Human Cardiac Arrhythmia Risk Prediction.

Zhen Song1,2, Fengze Sui1, Xiaodong Huang3,2

  • 1Pengcheng Laboratory, Shenzhen (Z.S., F.S., W.G.).

Circulation. Arrhythmia and Electrophysiology
|January 28, 2026
PubMed
Summary
This summary is machine-generated.

Computational models predict arrhythmia risk and drug effects. This approach aids antiarrhythmic drug discovery and safety testing by simulating virtual clinical trials for cardiovascular disease.

Keywords:
action potentialcalciumcardiotoxicitycardiovascular diseasedrug discovery

More Related Videos

Viral Transgene Expression in Rodent Hearts and the Assessment of Cardiac Arrhythmia Risk
05:15

Viral Transgene Expression in Rodent Hearts and the Assessment of Cardiac Arrhythmia Risk

Published on: July 27, 2022

2.1K
Rat Model of Right-Sided Cardiac Remodeling and Arrhythmia Using Pulmonary Artery Banding
10:39

Rat Model of Right-Sided Cardiac Remodeling and Arrhythmia Using Pulmonary Artery Banding

Published on: August 30, 2024

1.4K

Related Experiment Videos

Last Updated: Jan 29, 2026

Methods for ECG Evaluation of Indicators of Cardiac Risk, and Susceptibility to Aconitine-induced Arrhythmias in Rats Following Status Epilepticus
08:28

Methods for ECG Evaluation of Indicators of Cardiac Risk, and Susceptibility to Aconitine-induced Arrhythmias in Rats Following Status Epilepticus

Published on: April 5, 2011

18.2K
Viral Transgene Expression in Rodent Hearts and the Assessment of Cardiac Arrhythmia Risk
05:15

Viral Transgene Expression in Rodent Hearts and the Assessment of Cardiac Arrhythmia Risk

Published on: July 27, 2022

2.1K
Rat Model of Right-Sided Cardiac Remodeling and Arrhythmia Using Pulmonary Artery Banding
10:39

Rat Model of Right-Sided Cardiac Remodeling and Arrhythmia Using Pulmonary Artery Banding

Published on: August 30, 2024

1.4K

Area of Science:

  • Computational biology
  • Cardiovascular research
  • Pharmacology

Background:

  • Cardiovascular disease is a leading cause of death globally.
  • Sudden cardiac death from ventricular arrhythmias presents significant challenges.
  • Accurate risk prediction and novel preventive treatments are crucial.

Purpose of the Study:

  • To explore population-based computational modeling for virtual clinical trials.
  • To advance antiarrhythmic drug discovery and drug safety testing.
  • To improve prediction of arrhythmia risk and treatment efficacy.

Main Methods:

  • Developed diverse 1D cardiac tissue models for normal and Long QT syndromes (LQT1-3).
  • Matched models to clinical corrected QT interval distributions.
  • Simulated sympathetic stress by doubling L-type calcium current.

Main Results:

  • Model populations accurately predicted arrhythmia incidence and risk.
  • Demonstrated effectiveness of a therapeutic strategy targeting L-type calcium current.
  • Accurately predicted drug cardiotoxicity compared to clinical data.

Conclusions:

  • Population-based modeling shows promise as a computational platform.
  • Directly leverages human clinical study data for improved outcomes.
  • Facilitates enhanced arrhythmia risk prediction, antiarrhythmic therapy testing, and cardiotoxicity assessment.