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

The de Broglie Wavelength02:32

The de Broglie Wavelength

32.5K
In the macroscopic world, objects that are large enough to be seen by the naked eye follow the rules of classical physics. A billiard ball moving on a table will behave like a particle; it will continue traveling in a straight line unless it collides with another ball, or it is acted on by some other force, such as friction. The ball has a well-defined position and velocity or well-defined momentum, p = mv, which is defined by mass m and velocity v at any given moment. This is the typical...
32.5K
Photoelectric Effect02:26

Photoelectric Effect

38.1K
When light of a particular wavelength strikes a metal surface, electrons are emitted. This is called the photoelectric effect. The minimum frequency of light that can cause such emission of electrons is called the threshold frequency, which is specific to the metal. Light with a frequency lower than the threshold frequency, even if it is of high intensity, cannot initiate the emission of electrons. However, when the frequency is higher than the threshold value, the number of electrons ejected...
38.1K
Nuclear Overhauser Enhancement (NOE)01:07

Nuclear Overhauser Enhancement (NOE)

1.2K
Irradiation of a spin-active nucleus causes an increase or decrease in the signal intensity of neighboring nuclei that are not necessarily chemically bonded or involved in J-coupling.  This phenomenon, called the Nuclear Overhauser Enhancement (NOE), results from through-space interactions between the nuclear spins. The NOE effect decreases with increasing internuclear distance and is generally not observed beyond 4 angstroms. In NOE, dipole-dipole interactions between neighboring...
1.2K
Muscle Stimulation Frequency01:22

Muscle Stimulation Frequency

4.1K
The contraction strength of muscles is regulated by motor neurons, which modulate the frequency of action potentials dispatched to the motor units based on the body's requirements. This process of varying the muscle stimulation frequency allows muscles to contract with a force that is precisely tailored to the needs of the moment, whether lifting a feather or a heavy box.
Wave summation
At low firing rates, motor neurons induce individual twitch contractions in muscle fibers. These twitches...
4.1K
Atomic Nuclei: Larmor Precession Frequency01:11

Atomic Nuclei: Larmor Precession Frequency

2.4K
The earth's gravitational field produces a 'twisting force' perpendicular to the angular momentum of a spinning mass (such as a spinning top) that causes the mass to 'wobble' around the gravitational field axis in a phenomenon called precession. Similarly, the magnetic moment (μ) of a spinning nucleus precesses due to an external magnetic field directed along the z-axis. The precession of the magnetic moment vector about the magnetic field is called Larmor precession,...
2.4K
Standing Electromagnetic Waves01:15

Standing Electromagnetic Waves

2.1K
Electromagnetic waves can be reflected; the surface of a conductor or a dielectric can act as a reflector. As electric and magnetic fields obey the superposition principle, so do electromagnetic waves. The superposition of an incident wave and a reflected electromagnetic wave produces a standing wave analogous to the standing waves created on a stretched string.
Suppose a sheet of a perfect conductor is placed in the yz-plane, and a linearly polarized electromagnetic wave traveling in the...
2.1K

You might also read

Related Articles

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

Sort by
Same author

MAX-SHOCK: A Pragmatic Randomized Controlled Trial Comparing Biphasic Defibrillators Used in Routine Cardioversion of Atrial Fibrillation.

CJC open·2026
Same author

Scope and Outcome of Early Repolarization Syndrome in Unexplained Cardiac Arrest: Insights From the National HiRO Registry.

Circulation. Arrhythmia and electrophysiology·2026
Same author

Epinephrine Challenge: Long-Term Evaluation of Test Performance for the Evaluation of Unexplained Cardiac Arrest and Familial Sudden Death.

JACC. Clinical electrophysiology·2026
Same author

Validation of the PADIT (prevention of arrhythmia device infection trial) risk score for infection and infection subtypes.

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

Safety, Utility, and Outcomes of Procainamide Challenge for the Diagnosis and Exclusion of Brugada Syndrome.

Circulation·2025
Same author

Pulse Field Energy (of Dreams): Is it the Future of Ablation?

The Canadian journal of cardiology·2025
Same journal

Cardiovascular Risk Assessment: A Review of Current Models and Emerging Determinants, including Biomarkers, Genetics, and Artificial Intelligence.

Current cardiology reviews·2026
Same journal

Decoding the Genetic Architecture of Acute Coronary Syndrome: A Review on Integrated Medical Modeling.

Current cardiology reviews·2026
Same journal

Prognostic Value of Ceramide-Based Lipid Scores in Cardiovascular Disease and Heart Failure: Insights From CERT1, CERT2, and Ceramide Ratios.

Current cardiology reviews·2026
Same journal

Sudden Arrhythmic Death Presenting with Convulsive Syncope In A Young Man With Severe Coronary Atherosclerosis And Hyperthyroidism: A Case Report.

Current cardiology reviews·2026
Same journal

Bridging Dermatology and Cardiology: The Link between Skin Lesions and Cardiovascular Risk.

Current cardiology reviews·2026
Same journal

A Comprehensive Review on Thoracic Fluid Measurement Devices.

Current cardiology reviews·2026
See all related articles

Related Experiment Video

Updated: Dec 14, 2025

Conducting Hyperscanning Experiments with Functional Near-Infrared Spectroscopy
06:42

Conducting Hyperscanning Experiments with Functional Near-Infrared Spectroscopy

Published on: January 19, 2019

10.8K

The Wenckebach Phenomenon.

Simon P Hansom1, Mehrdad Golian1, Martin S Green1

  • 1University of Ottawa Heart Institute, 40 Ruskin Street, Ottawa, Ontario, K1Y 4W7, Canada.

Current Cardiology Reviews
|July 20, 2020
PubMed
Summary
This summary is machine-generated.

Karel Frederik Wenckebach

Keywords:
AV nodeECGMobitz type 1Wenckebachatrioventricular blockelectrophysiology

More Related Videos

Author Spotlight: Unlocking New Insights in fNIRS Studies - A Novel Framework for Inter-Brain Synchrony Analysis
05:59

Author Spotlight: Unlocking New Insights in fNIRS Studies - A Novel Framework for Inter-Brain Synchrony Analysis

Published on: October 6, 2023

3.1K
Optocardiography and Electrophysiology Studies of Ex Vivo Langendorff-perfused Hearts
09:52

Optocardiography and Electrophysiology Studies of Ex Vivo Langendorff-perfused Hearts

Published on: November 7, 2019

13.5K

Related Experiment Videos

Last Updated: Dec 14, 2025

Conducting Hyperscanning Experiments with Functional Near-Infrared Spectroscopy
06:42

Conducting Hyperscanning Experiments with Functional Near-Infrared Spectroscopy

Published on: January 19, 2019

10.8K
Author Spotlight: Unlocking New Insights in fNIRS Studies - A Novel Framework for Inter-Brain Synchrony Analysis
05:59

Author Spotlight: Unlocking New Insights in fNIRS Studies - A Novel Framework for Inter-Brain Synchrony Analysis

Published on: October 6, 2023

3.1K
Optocardiography and Electrophysiology Studies of Ex Vivo Langendorff-perfused Hearts
09:52

Optocardiography and Electrophysiology Studies of Ex Vivo Langendorff-perfused Hearts

Published on: November 7, 2019

13.5K

Area of Science:

  • Cardiology
  • Electrophysiology

Background:

  • The Wenckebach Phenomenon, a fundamental concept in electrophysiology, was discovered by Karel Frederik Wenckebach in 1899.
  • Electrophysiology has since advanced, enabling new methods to study this phenomenon.

Purpose of the Study:

  • To illustrate Wenckebach behavior across various electrophysiological modalities.
  • To highlight the enduring significance of Wenckebach's discovery.

Main Methods:

  • Review of Wenckebach behavior observed in 12-lead ECG.
  • Analysis of intra-cardiac recordings from electrophysiological studies.
  • Examination of data from implantable cardiac devices.

Main Results:

  • Wenckebach behavior is observable and complex across multiple electrophysiological recording methods.
  • The phenomenon demonstrates consistent patterns across different diagnostic tools.

Conclusions:

  • Wenckebach behavior remains a crucial concept in modern electrophysiology.
  • Diverse modalities provide valuable insights into this 120-year-old phenomenon.