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

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

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

33
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...
33
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
Disturbances in Heart Rhythm01:28

Disturbances in Heart Rhythm

997
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...
997
Mitral Valve Prolapse I: Introduction01:27

Mitral Valve Prolapse I: Introduction

21
IntroductionThe mitral valve, one of the heart's four valves, regulates blood flow. These valves have flaps that open and close to direct blood properly through the heart and body. During each heartbeat, the flaps open for blood to pass through and seal shut to prevent backflow. Specifically, the mitral valve opens to allow blood flow from the heart's upper left chamber to the lower left chamber. It then closes securely as the lower left chamber contracts to pump blood to the body, preventing...
21
Dysrhythmias II: Classification of Tachyarrhythmias01:28

Dysrhythmias II: Classification of Tachyarrhythmias

10
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...
10
Dysrhythmias IV: Characteristics of Bradyarrhythmias01:18

Dysrhythmias IV: Characteristics of Bradyarrhythmias

11
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...
11

You might also read

Related Articles

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

Sort by
Same author

Observation of a mixed close-packed structure in superionic water.

Nature communications·2025
Same author

A publicly accessible global data repository - the WHO TB-IPD platform.

IJTLD open·2024
Same author

Characteristics and special challenges of neonatal emergency transports.

Early human development·2024
Same author

Corrigendum to "The effect of an internet-based intervention for depression on cortisol and alpha-amylase" [Psychoneuroendocrinology 152 (2023) 106082].

Psychoneuroendocrinology·2024
Same author

Hair glucocorticoids during pregnancy in the context of trauma exposure and their predictive value for the development of childbirth-related posttraumatic stress disorder symptoms.

Psychoneuroendocrinology·2022
Same author

[Cardiac sarcoidosis: Diagnosis, prognosis and therapeutics].

La Revue de medecine interne·2022

Related Experiment Video

Updated: Jul 15, 2025

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

Focus on malignant ventricular premature contractions.

S Marrakchi1, N Badenco2, S Schumacher3

  • 1Université de Sorbonne, AP-HP, Centre Hospitalo-universitaire Pitié-Salpêtrière, Institut de Cardiology, ICAN, Paris, France; Département de Cardiologie, Hospital André Mignot, Versailles, France; University El Manar, Tunis, Tunisie.

Annales De Cardiologie Et D'Angeiologie
|September 24, 2023
PubMed
Summary
This summary is machine-generated.

Frequent premature ventricular contractions (PVCs) require risk assessment, especially with structural heart disease. Early recognition and treatment of malignant PVCs are crucial for preventing sudden cardiac death and improving prognosis.

Keywords:
ArrhythmiaArythmieBattement prématuré ventriculaireExtrasystole ventriculaireFibrillation ventriculaireTachycardie ventriculaireVentricular extrasystoleVentricular fibrillationVentricular premature beatVentricular tachycardia

More Related Videos

Dual-Dye Optical Mapping of Hearts from RyR2R2474S Knock-In Mice of Catecholaminergic Polymorphic Ventricular Tachycardia
09:36

Dual-Dye Optical Mapping of Hearts from RyR2R2474S Knock-In Mice of Catecholaminergic Polymorphic Ventricular Tachycardia

Published on: December 22, 2023

1.2K
Benefits of Cardiac Resynchronization Therapy in an Asynchronous Heart Failure Model Induced by Left Bundle Branch Ablation and Rapid Pacing
12:45

Benefits of Cardiac Resynchronization Therapy in an Asynchronous Heart Failure Model Induced by Left Bundle Branch Ablation and Rapid Pacing

Published on: December 11, 2017

10.5K

Related Experiment Videos

Last Updated: Jul 15, 2025

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
Dual-Dye Optical Mapping of Hearts from RyR2R2474S Knock-In Mice of Catecholaminergic Polymorphic Ventricular Tachycardia
09:36

Dual-Dye Optical Mapping of Hearts from RyR2R2474S Knock-In Mice of Catecholaminergic Polymorphic Ventricular Tachycardia

Published on: December 22, 2023

1.2K
Benefits of Cardiac Resynchronization Therapy in an Asynchronous Heart Failure Model Induced by Left Bundle Branch Ablation and Rapid Pacing
12:45

Benefits of Cardiac Resynchronization Therapy in an Asynchronous Heart Failure Model Induced by Left Bundle Branch Ablation and Rapid Pacing

Published on: December 11, 2017

10.5K

Area of Science:

  • Cardiology
  • Electrophysiology
  • Internal Medicine

Background:

  • Premature ventricular contractions (PVCs) are common arrhythmias.
  • While often benign, PVCs can indicate underlying structural heart disease and increase morbidity and mortality.
  • Malignant rapid ventricular arrhythmias (MRVAs), including ventricular fibrillation, can be triggered by PVCs.

Purpose of the Study:

  • To review risk stratification for PVCs in patients with and without structural heart disease.
  • To discuss current management strategies for PVCs.
  • To highlight the importance of early intervention for malignant PVCs.

Main Methods:

  • Literature search of PubMed for English-language reports.
  • Keywords included PVCs, antiarrhythmic drugs, ablation, and ventricular arrhythmias.
  • Analysis of risk factors, clinical presentation, and therapeutic options.

Main Results:

  • All patients with frequent PVCs need assessment for burden, symptoms, and structural heart disease.
  • PVCs can precipitate life-threatening arrhythmias, with ventricular fibrillation being a primary mode of MRVA.
  • Patients with high PVC burden (>10%) and underlying conditions like myocardial infarction or heart failure face increased MRVA risk.

Conclusions:

  • Timely recognition and treatment of malignant PVCs in symptomatic patients, especially those with cardiomyopathy, are essential.
  • Catheter ablation is a highly effective treatment, particularly for patients with left ventricular dysfunction.
  • Effective management of PVCs improves long-term prognosis and reduces the risk of sudden cardiac death.