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

Disturbances in Heart Rhythm01:29

Disturbances in Heart Rhythm

2.3K
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 heart...
2.3K
Mechanism of Cardiac Arrhythmias01:28

Mechanism of Cardiac Arrhythmias

1.5K
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.
1.5K
ECG Interpretation of Arrhythmias II: Atrial, Junctional and Ventricular Arrhythmias01:25

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

345
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...
345
Dysrhythmias IV: Characteristics of Bradyarrhythmias01:18

Dysrhythmias IV: Characteristics of Bradyarrhythmias

376
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...
376
Dysrhythmias III: Characteristics of Dysrhythmias01:29

Dysrhythmias III: Characteristics of Dysrhythmias

304
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...
304
Electrophysiology of Normal Cardiac Rhythm01:19

Electrophysiology of Normal Cardiac Rhythm

8.5K
The normal cardiac rhythm is a synchronized electrical activity that facilitates the regular and coordinated contraction of the heart muscle. This process is essential for efficient blood circulation throughout the body. The fundamental elements involved in establishing and maintaining this rhythm include the unique electrical properties of cardiac muscle cells, the sinoatrial (SA) node's pacemaker function, the specialized conducting system, and the ionic mechanisms underlying each phase...
8.5K

You might also read

Related Articles

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

Sort by
Same author

Catheter Ablation of Ischemic Ventricular Tachycardia Originating from an Inferobasal Right Ventricular Scar Using Substrate Mapping: A Case Report.

The Journal of innovations in cardiac rhythm management·2020
Same author

Atrial Fibrillation Catheter Ablation: Overcoming Complications and Improving Success.

The Journal of innovations in cardiac rhythm management·2020
Same author

Inappropriate sinus tachycardia-symptom and heart rate reduction with ivabradine: A pooled analysis of prospective studies.

Heart rhythm·2017
Same author

Drug Therapy for Stable Angina Pectoris.

Drugs·2017
Same author

The risk of cardiovascular side effects with anti-anginal drugs.

Expert opinion on drug safety·2016
Same author

Invasive strategy in acute coronary syndrome.

Lancet (London, England)·2016

Related Experiment Video

Updated: Dec 20, 2025

Patient-specific Modeling of the Heart: Estimation of Ventricular Fiber Orientations
12:09

Patient-specific Modeling of the Heart: Estimation of Ventricular Fiber Orientations

Published on: January 8, 2013

14.0K

Ventricular Arrhythmias in the Patient with a Structurally Normal Heart.

Daniel A Sohinki1, Sunil T Mathew1,2

  • 1Department of Cardiology, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA.

The Journal of Innovations in Cardiac Rhythm Management
|June 2, 2020
PubMed
Summary

Idiopathic ventricular arrhythmias (VAs) can occur without clear causes, posing clinical challenges. This review details their types, mechanisms, and management, including catheter ablation for idiopathic ventricular tachycardia.

Keywords:
Premature ventricular contractionstructural heart diseasestructurally normal heartventricular arrhythmia

More Related Videos

Isolation of Atrial Myocytes from Adult Mice
08:34

Isolation of Atrial Myocytes from Adult Mice

Published on: July 25, 2019

11.3K
Isolation and Functional Characterization of Human Ventricular Cardiomyocytes from Fresh Surgical Samples
14:39

Isolation and Functional Characterization of Human Ventricular Cardiomyocytes from Fresh Surgical Samples

Published on: April 21, 2014

17.7K

Related Experiment Videos

Last Updated: Dec 20, 2025

Patient-specific Modeling of the Heart: Estimation of Ventricular Fiber Orientations
12:09

Patient-specific Modeling of the Heart: Estimation of Ventricular Fiber Orientations

Published on: January 8, 2013

14.0K
Isolation of Atrial Myocytes from Adult Mice
08:34

Isolation of Atrial Myocytes from Adult Mice

Published on: July 25, 2019

11.3K
Isolation and Functional Characterization of Human Ventricular Cardiomyocytes from Fresh Surgical Samples
14:39

Isolation and Functional Characterization of Human Ventricular Cardiomyocytes from Fresh Surgical Samples

Published on: April 21, 2014

17.7K

Area of Science:

  • Cardiology
  • Electrophysiology
  • Cardiac Arrhythmias

Background:

  • Ventricular arrhythmias (VAs) are common and can cause hemodynamic compromise.
  • Idiopathic VAs lack obvious underlying cardiac or systemic causes.
  • Some idiopathic VAs, including polymorphic ventricular tachycardia, have complex prognoses.

Purpose of the Study:

  • To review common types of idiopathic VAs.
  • To focus on prognostic implications, electrophysiologic mechanisms, and ECG findings.
  • To discuss invasive electrophysiologic study and catheter ablation for idiopathic VAs.

Main Methods:

  • Literature review of idiopathic ventricular arrhythmias.
  • Analysis of prognostic implications and clinical presentations.
  • Discussion of diagnostic and therapeutic strategies, including electrophysiologic studies and ablation.

Main Results:

  • Idiopathic VAs encompass diverse conditions with varying prognoses.
  • Specific electrocardiographic signatures aid in identifying VA origins.
  • Catheter ablation is an effective treatment for many idiopathic VAs.

Conclusions:

  • Understanding idiopathic VA mechanisms is crucial for management.
  • Early diagnosis and risk stratification improve patient outcomes.
  • Invasive strategies like catheter ablation offer therapeutic options for refractory cases.