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Related Concept Videos

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...
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 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 VI: Management of Dysrhythmias01:25

Dysrhythmias VI: Management of Dysrhythmias

Dysrhythmia management involves a multifaceted approach, incorporating pharmacological treatments, medical procedures, surgical interventions, lifestyle modifications, and patient education.Pharmacological ManagementAntiarrhythmic Drugs:Class I (Sodium Channel Blockers): This class includes quinidine and procainamide, which reduce the speed of impulse conduction in the heart, stabilize the cardiac membrane, and control arrhythmias. Quinidine and procainamide are Class IA agents that prolong the...
Cardiopulmonary Resuscitation III: AED Use01:23

Cardiopulmonary Resuscitation III: AED Use

Introduction to AEDAn Automated External Defibrillator (AED) is a portable medical device that analyzes the heart's rhythm and, if necessary, delivers an electrical shock to help the heart re-establish an effective rhythm during sudden cardiac arrest (SCA). SCA occurs when the heart suddenly and unexpectedly stops beating, leading to a loss of blood flow to the brain and other vital organs. In such emergencies, time is of the essence, and using an AED, combined with Cardiopulmonary...
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...

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Related Experiment Video

Updated: Jun 15, 2026

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

Catheter ablation for ventricular tachycardia.

H S Lim1, C B Singleton, M Alasady

  • 1Department of Cardiovascular Medicine, Flinders Medical Centre, Cardiovascular Research Centre, Department of Cardiology, Royal Adelaide Hospital and the Discipline of Physiology, School of Molecular and Biomedical Science, University of Adelaide and School of Medicine, Flinders University, Adelaide, South Australia, Australia.

Internal Medicine Journal
|March 11, 2010
PubMed
Summary

Catheter ablation offers a potentially curative treatment for ventricular tachycardia (VT) in patients with structurally normal hearts. Recent advancements enhance its efficacy, providing a valuable alternative to implantable cardioverter defibrillators for managing these arrhythmias.

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Catheter Ablation in Combination With Left Atrial Appendage Closure for Atrial Fibrillation
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Last Updated: Jun 15, 2026

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

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

Robotic Ablation of Atrial Fibrillation
11:21

Robotic Ablation of Atrial Fibrillation

Published on: May 29, 2015

Area of Science:

  • Cardiology
  • Electrophysiology

Background:

  • Sudden cardiac death from ventricular arrhythmias is a leading cause of mortality.
  • Implantable cardioverter defibrillators reduce mortality but do not cure arrhythmias.
  • Ventricular tachycardia in structurally normal hearts often carries a lower sudden death risk.

Purpose of the Study:

  • To review recent advancements in catheter ablation for ventricular tachycardia (VT).
  • To discuss the clinical utility and patient selection for VT ablation.
  • To highlight the growing role of ablation in managing ventricular arrhythmias.

Main Methods:

  • Review of recent literature on catheter ablation techniques for VT.
  • Analysis of advancements in lesion creation and 3D mapping.
  • Discussion of mapping unstable VT and treatment efficacy.

Main Results:

  • Catheter ablation is a potentially curative option for VT in select patients.
  • Technological advances have improved ablation efficacy and mapping accuracy.
  • Ablation is increasingly utilized for ventricular arrhythmias, including unstable VT.

Conclusions:

  • Recent advances have renewed interest in catheter ablation for VT.
  • Catheter ablation offers a curative approach for VT in structurally normal hearts.
  • Understanding clinical utility and referral criteria is crucial for optimal patient management.