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

Dysrhythmias III: Characteristics of Dysrhythmias01:29

Dysrhythmias III: Characteristics of Dysrhythmias

12
Dysrhythmias, also known as arrhythmias, are irregular heart rhythms that result from abnormal electrical activity in the heart, affecting its ability to circulate blood efficiently. Tachyarrhythmias, a subset of dysrhythmias, are characterized by abnormally fast heart rates exceeding 100 beats per minute. Here are some types of tachyarrhythmias with their distinct ECG features:Sinus Tachycardia:Sinus tachycardia presents a regular heart rhythm with an increased rate of 101-180 beats per...
12
ECG Interpretation of Arrhythmias II: Atrial, Junctional and Ventricular Arrhythmias01:25

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

45
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...
45
Disturbances in Heart Rhythm01:28

Disturbances in Heart Rhythm

1.0K
Arrhythmia or dysrhythmia refers to an abnormal heart rhythm caused by a defect in the heart's conduction system. It can cause the heart to beat irregularly, too quickly, or too slowly, leading to symptoms like chest pain, shortness of breath, and fainting. Factors such as stress, caffeine, alcohol, nicotine, cocaine, certain drugs, congenital defects, diseases, and electrolyte abnormalities can trigger arrhythmias.
Arrhythmias are categorized by their speed, rhythm, and origin. A slow...
1.0K
Dysrhythmias II: Classification of Tachyarrhythmias01:28

Dysrhythmias II: Classification of Tachyarrhythmias

11
Tachyarrhythmias are a type of dysrhythmia where the heart rate exceeds 100 beats per minute. Here are some common types of tachyarrhythmias:Sinus TachycardiaSinus tachycardia originates from increased impulses from the sinus node, leading to an elevated heart rate. It is often triggered by stress, fever, or exercise.Patients may experience palpitations, a sensation of a racing heart, dizziness, and chest discomfort.Causes and Risk Factors: Common causes include physical exertion, emotional...
11
Dysrhythmias IV: Characteristics of Bradyarrhythmias01:18

Dysrhythmias IV: Characteristics of Bradyarrhythmias

12
Bradyarrhythmias are cardiac rhythm disorders characterized by a slower-than-normal heart rate, typically defined as fewer than 60 beats per minute. Some of which are discussed here:Sinus BradycardiaSinus bradycardia presents a heart rate lower than 60 beats per minute, with a regular rhythm originating from the SA node. The ECG typically shows normal P waves preceding each QRS complex, a normal PR interval (0.12 to 0.20 seconds), and a normal QRS duration (0.06 to 0.10 seconds).First-Degree AV...
12
Mechanism of Cardiac Arrhythmias01:28

Mechanism of Cardiac Arrhythmias

955
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.
955

You might also read

Related Articles

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

Sort by
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

Author Corrections to: "Canadian Cardiovascular Society 2023 Guidelines on the Fitness to Drive [Canadian Journal of Cardiology, Volume 40, Issue 4 500-523, DOI: 10.1016/j.cjca.2023.09.033]".

The Canadian journal of cardiology·2026
Same author

The Canadian Cardiovascular Society/Canadian Heart Rhythm Society Comprehensive Guidelines for the Selection, Implantation, and Management of Patients With Cardiac Implantable Electronic Devices.

The Canadian journal of cardiology·2026
Same author

Current Challenges in Cardiac Device Management: Guidance for Practicing Clinicians: A Canadian Journal of Cardiology White Paper.

The Canadian journal of cardiology·2026
Same author

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

Circulation·2025
Same journal

Sweating the Details: A Reflective Pause in our Procedural Workflow.

Cardiac electrophysiology clinics·2026
Same journal

Patent Foramen Ovale and Atrial Septal Defect.

Cardiac electrophysiology clinics·2026
Same journal

Patent Foramen Ovale Embryology, Anatomy, and Physiology.

Cardiac electrophysiology clinics·2026
Same journal

Management of Arrhythmias in the Cardiovascular Intensive Care Unit.

Cardiac electrophysiology clinics·2026
Same journal

Left Ventricular Assist Device Emergencies: Diagnosis and Management.

Cardiac electrophysiology clinics·2026
Same journal

Advanced Critical Care Techniques in the Field.

Cardiac electrophysiology clinics·2026
See all related articles

Related Experiment Video

Updated: Jul 19, 2025

A Model of Long-Term Ventricular Fibrillation in Isolated Rat Hearts
07:56

A Model of Long-Term Ventricular Fibrillation in Isolated Rat Hearts

Published on: February 17, 2023

963

Short-Coupled Ventricular Fibrillation.

Christian Steinberg1

  • 1Institut universitaire de cardiologie et pneumologie de Québec (IUCPQ-UL), Laval University, 2725 Chemin Ste-Foy, Quebec, QC, G1V 4G5, Canada.

Cardiac Electrophysiology Clinics
|August 9, 2023
PubMed
Summary
This summary is machine-generated.

Short-coupled ventricular fibrillation (SCVF), a cause of unexplained cardiac arrest, is identified by a specific premature ventricular contraction pattern. Management focuses on implantable cardioverter-defibrillators and quinidine due to high recurrence risk.

Keywords:
Idiopathic ventricular fibrillationPremature ventricular contractionShort-coupled ventricular fibrillationUnexplained cardiac arrest

More Related Videos

Ablation of Ischemic Ventricular Tachycardia Using a Multipolar Catheter and 3-dimensional Mapping System for High-density Electro-anatomical Reconstruction
06:57

Ablation of Ischemic Ventricular Tachycardia Using a Multipolar Catheter and 3-dimensional Mapping System for High-density Electro-anatomical Reconstruction

Published on: January 31, 2019

14.8K
Standardized Model of Ventricular Fibrillation and Advanced Cardiac Life Support in Swine
05:36

Standardized Model of Ventricular Fibrillation and Advanced Cardiac Life Support in Swine

Published on: January 30, 2020

7.8K

Related Experiment Videos

Last Updated: Jul 19, 2025

A Model of Long-Term Ventricular Fibrillation in Isolated Rat Hearts
07:56

A Model of Long-Term Ventricular Fibrillation in Isolated Rat Hearts

Published on: February 17, 2023

963
Ablation of Ischemic Ventricular Tachycardia Using a Multipolar Catheter and 3-dimensional Mapping System for High-density Electro-anatomical Reconstruction
06:57

Ablation of Ischemic Ventricular Tachycardia Using a Multipolar Catheter and 3-dimensional Mapping System for High-density Electro-anatomical Reconstruction

Published on: January 31, 2019

14.8K
Standardized Model of Ventricular Fibrillation and Advanced Cardiac Life Support in Swine
05:36

Standardized Model of Ventricular Fibrillation and Advanced Cardiac Life Support in Swine

Published on: January 30, 2020

7.8K

Area of Science:

  • Cardiology
  • Electrophysiology
  • Sudden Cardiac Death

Background:

  • Short-coupled ventricular fibrillation (SCVF) represents 7-14% of idiopathic ventricular fibrillation (IVF) cases.
  • SCVF is triggered by premature ventricular contractions with short coupling intervals (<350ms).
  • Diagnosis is challenging due to lack of specific ECG markers and often relies on documented recurrence.

Purpose of the Study:

  • To characterize the distinct phenotype of SCVF.
  • To highlight diagnostic challenges and management strategies for SCVF.

Main Methods:

  • Review of clinical data for patients with SCVF.
  • Analysis of electrocardiographic features and clinical presentation.
  • Evaluation of management outcomes.

Main Results:

  • SCVF is initiated by specific premature ventricular contractions.
  • High risk of ventricular fibrillation recurrence is characteristic of SCVF.
  • Diagnosis is often delayed until VF recurrence.

Conclusions:

  • SCVF is a distinct phenotype of IVF with a significant risk of recurrence.
  • Implantable cardioverter-defibrillators and quinidine are primary management strategies.
  • Early identification and intervention are crucial for improving outcomes in SCVF patients.