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

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.
Disturbances in Heart Rhythm01:29

Disturbances in Heart Rhythm

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...
Dysrhythmias II: Classification of Tachyarrhythmias01:28

Dysrhythmias II: Classification of Tachyarrhythmias

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...
Dysrhythmias III: Characteristics of Dysrhythmias01:29

Dysrhythmias III: Characteristics of Dysrhythmias

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 minute.
Dysrhythmias IV: Characteristics of Bradyarrhythmias01:18

Dysrhythmias IV: Characteristics of Bradyarrhythmias

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

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

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...

You might also read

Related Articles

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

Sort by
Same author

Implantable cardioverter defibrillator infection causing constrictive pericarditis.

Chest·1992
Same author

Intraoperative identification of a radiofrequency lesion allowing validation of catheter mapping of ventricular tachycardia with a computerized balloon mapping system.

Pacing and clinical electrophysiology : PACE·1992
Same author

Implantable cardioverter defibrillators: where do we go from here?

Journal of the American College of Cardiology·1992
Same author

Long-term results of antitachycardia pacing in patients with supraventricular tachycardia.

Pacing and clinical electrophysiology : PACE·1989
Same author

Role of invasive electrophysiologic testing in the management of life-threatening ventricular arrhythmias.

The American journal of cardiology·1988
Same author

Amiodarone pulmonary toxicity: prospective evaluation of serial pulmonary function tests.

Journal of the American College of Cardiology·1988

Related Experiment Video

Updated: Jul 28, 2026

High-Resolution Endocardial and Epicardial Optical Mapping in a Sheep Model of Stretch-Induced Atrial Fibrillation
09:17

High-Resolution Endocardial and Epicardial Optical Mapping in a Sheep Model of Stretch-Induced Atrial Fibrillation

Published on: July 29, 2011

Atrial fibrillation: the most common arrhythmia.

C R Wyndham1

  • 1North Texas Heart Center, Dallas 75231-4469, USA.

Texas Heart Institute Journal
|November 28, 2000
PubMed
Summary

Atrial fibrillation management requires individualized approaches, focusing on preventing blood clots and controlling heart rhythm. Treatment options include medications, radiofrequency ablation, and device therapy to maintain normal sinus rhythm.

Area of Science:

  • Cardiology
  • Electrophysiology

Background:

  • Atrial fibrillation is the most common sustained arrhythmia, increasing with age.
  • It presents with varied symptoms and severity, with paroxysmal, persistent, and permanent forms needing tailored management.
  • Electrical and anatomic remodeling highlight time-related thrombogenicity and impaired atrial/ventricular function.

Purpose of the Study:

  • To review current understanding and management strategies for atrial fibrillation.
  • To emphasize risk stratification for thromboembolism.
  • To discuss therapeutic choices for preventing recurrent atrial fibrillation.

Main Methods:

  • Review of current literature on atrial fibrillation.
  • Discussion of diagnostic and therapeutic approaches.

More Related Videos

The WATCHMAN Left Atrial Appendage Closure Device for Atrial Fibrillation
23:33

The WATCHMAN Left Atrial Appendage Closure Device for Atrial Fibrillation

Published on: February 28, 2012

Catheter Ablation in Combination With Left Atrial Appendage Closure for Atrial Fibrillation
28:13

Catheter Ablation in Combination With Left Atrial Appendage Closure for Atrial Fibrillation

Published on: February 26, 2013

Related Experiment Videos

Last Updated: Jul 28, 2026

High-Resolution Endocardial and Epicardial Optical Mapping in a Sheep Model of Stretch-Induced Atrial Fibrillation
09:17

High-Resolution Endocardial and Epicardial Optical Mapping in a Sheep Model of Stretch-Induced Atrial Fibrillation

Published on: July 29, 2011

The WATCHMAN Left Atrial Appendage Closure Device for Atrial Fibrillation
23:33

The WATCHMAN Left Atrial Appendage Closure Device for Atrial Fibrillation

Published on: February 28, 2012

Catheter Ablation in Combination With Left Atrial Appendage Closure for Atrial Fibrillation
28:13

Catheter Ablation in Combination With Left Atrial Appendage Closure for Atrial Fibrillation

Published on: February 26, 2013

  • Evaluation of antiarrhythmic drugs, radiofrequency ablation, and device therapy.

    • Main Results:

    • Risk stratification for thromboembolism is crucial for diagnosis.
    • Treatment goals prioritize thromboembolism prevention, ventricular response control, and rhythm restoration/maintenance.
    • Therapeutic options are reviewed in context of these goals.

    Conclusions:

    • Individualized management is essential for different atrial fibrillation forms.
    • Understanding remodeling is key to addressing thrombogenicity and mechanical dysfunction.
    • Effective strategies for preventing recurrent atrial fibrillation involve a combination of medical, interventional, and device-based therapies.