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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

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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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Disturbances in Heart Rhythm01:29

Disturbances in Heart Rhythm

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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.
Arrhythmias are categorized by their speed, rhythm, and origin. A slow heart...
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Heart Failure VI: Adjunct Therapies01:22

Heart Failure VI: Adjunct Therapies

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Additional therapies for treating patients with heart failure (HF) may include procedural interventions, supplemental oxygen, the management of sleep disorders, and nutritional therapy.Procedural InterventionsImplantable Cardioverter-Defibrillator: For patients at risk of life-threatening arrhythmias due to severe left ventricular dysfunction, an Implantable Cardioverter-Defibrillator (ICD) can detect and terminate these arrhythmias, preventing sudden cardiac death and improving survival rates.
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Dysrhythmias IV: Characteristics of Bradyarrhythmias01:18

Dysrhythmias IV: Characteristics of Bradyarrhythmias

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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...
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Mechanism of Cardiac Arrhythmias01:28

Mechanism of Cardiac Arrhythmias

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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.
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Dysrhythmias VI: Management of Dysrhythmias01:25

Dysrhythmias VI: Management of Dysrhythmias

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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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Updated: Mar 29, 2026

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

Andrea N Keithler1, Klitos Konstantinidis1

  • 1Division of Cardiovascular Medicine, Cardiac Electrophysiology, University of Utah Health, Salt Lake City, UT, USA.

Heart Failure Clinics
|March 27, 2026
PubMed
Summary

Ventricular arrhythmia in heart failure patients causes significant mortality. Early intervention with therapies like antiarrhythmic drugs and catheter ablation is essential for better outcomes.

Keywords:
Anti-arrhythmic drugsCatheter ablationDefibrillatorHeart failureStereotactic radiotherapyVentricular arrhythmiaVentricular tachycardia

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Area of Science:

  • Cardiology
  • Electrophysiology
  • Heart Failure Research

Background:

  • Ventricular arrhythmia poses a significant threat to patients with heart failure, leading to increased morbidity and mortality.
  • Despite current heart failure treatments, ventricular arrhythmias remain a persistent clinical challenge.
  • These arrhythmias contribute to serious complications such as electrical storm, cardiogenic shock, and sudden cardiac arrest.

Purpose of the Study:

  • To highlight the challenges in managing ventricular arrhythmia within the heart failure population.
  • To emphasize the importance of early and comprehensive management strategies.
  • To underscore the impact of ventricular arrhythmia on patient outcomes.

Main Methods:

  • Review of current therapeutic strategies for ventricular arrhythmia in heart failure.
  • Analysis of the impact of ventricular arrhythmia on morbidity and mortality.
  • Discussion of adjunctive procedural management options.

Main Results:

  • Ventricular arrhythmia is associated with high rates of sudden cardiac death and device therapies in heart failure patients.
  • Management includes antiarrhythmic drugs, cardiac implantable electronic devices, and catheter ablation.
  • Early intervention strategies are crucial for reducing adverse events.

Conclusions:

  • Effective management of ventricular arrhythmia is critical for improving survival in heart failure patients.
  • A multi-faceted approach combining medical, device, and procedural therapies is necessary.
  • Timely intervention can mitigate the risks of recurrent arrhythmias and associated mortality.