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

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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...
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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...
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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.
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Dysrhythmias II: Classification of Tachyarrhythmias01:28

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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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Cardiomyopathy V: Interprofessional Care01:29

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Managing cardiomyopathy involves addressing underlying or precipitating causes, treating heart failure with medications, and implementing dietary changes and a balanced exercise and rest regimen.Lifestyle ModificationsCardiomyopathy patients should adopt a low-sodium diet to reduce fluid retention and manage heart failure. A personalized exercise and rest plan helps maintain physical fitness without overstraining the heart. Avoiding alcohol and tobacco is essential to prevent further damage to...
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Cardiopulmonary Resuscitation IV: Pharmacological Management01:25

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Pharmacologic intervention is crucial in treating cardiac arrest patients during ACLS or Advanced Cardiovascular Life Support. The ACLS algorithms guide the administration of specific drugs based on the patient's cardiac arrest rhythm, which includes pulseless ventricular tachycardia (VT), ventricular fibrillation (VF), asystole, and pulseless electrical activity (PEA).EpinephrineIndication: Epinephrine is the first-line drug for all cardiac arrest rhythms.Mechanism of Action: Epinephrine...
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Related Experiment Video

Updated: Nov 23, 2025

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

Timothy Campbell1,2, Richard G Bennett1,2, Yasuhito Kotake1,2

  • 1Department of Cardiology, Westmead Hospital, Sydney, Australia.

Korean Circulation Journal
|December 30, 2020
PubMed
Summary
This summary is machine-generated.

Sudden cardiac death from ventricular tachycardia (VT) is a major concern. Catheter ablation improves VT-free survival compared to medical therapy, offering a better treatment approach for patients with heart disease.

Keywords:
Multimodal imagingRadiofrequency ablationSympathectomyVentricular arrhythmiasVentricular tachycardia

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Area of Science:

  • Cardiology
  • Electrophysiology
  • Medical Device Technology

Background:

  • Sudden cardiac death (SCD) from recurrent ventricular tachycardia (VT) is a significant clinical issue in patients with structural heart disease.
  • Ventricular tachycardia (VT) mechanisms involve re-entry in arrhythmogenic substrate (scar) and focal origins.
  • Catheter ablation offers improved VT-free survival and reduced device burden compared to standard medical therapy.

Purpose of the Study:

  • To review recent advancements in ventricular tachycardia (VT) ablation techniques.
  • To discuss current clinical trials, risk assessments, cardiac imaging, and mapping in VT ablation.
  • To provide an update on catheter and non-catheter based ablation strategies for VT.

Main Methods:

  • Review of current clinical trials and literature on VT ablation.
  • Analysis of peri-procedure risk assessments and pre-procedural cardiac imaging.
  • Evaluation of electro-anatomic mapping and novel ablation technologies.

Main Results:

  • Catheter ablation demonstrates superior outcomes in VT-free survival and device burden reduction.
  • Advances in imaging and mapping enhance procedural precision and success rates.
  • New catheter and non-catheter ablation techniques are expanding treatment options.

Conclusions:

  • Ventricular tachycardia (VT) ablation is a crucial therapeutic strategy for patients with structural heart disease.
  • Technological and procedural advancements are continually improving the efficacy and safety of VT ablation.
  • Personalized approaches based on underlying substrate and imaging are key to successful VT management.