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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 Rhythm01:28

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...
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Mechanism of Cardiac Arrhythmias01:28

Mechanism of Cardiac Arrhythmias

925
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.
925
Imaging Studies for Cardiovascular System II:Types of Echocardiography01:20

Imaging Studies for Cardiovascular System II:Types of Echocardiography

273
Echocardiography plays a role in assessing cardiac health and detecting heart conditions, with various types providing critical insights for diagnosis and treatment.
Types of Echocardiography
Transthoracic Echocardiography (TTE)
TTE is the most common type of echocardiogram which involves placing a transducer on the patient's chest, emitting sound waves to create heart images. TTE is invaluable for evaluating the heart's size, structure, and motion, making it particularly useful for...
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Related Experiment Video

Updated: Jul 9, 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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How Imaging Techniques Improve Ventricular Arrhythmia Ablation: A Multimodality-Based Approach.

Antonio Gianluca Robles1,2,3, Matevž Jan4, Tine Prolič Kalinšek4

  • 1Department of Life, Health and Environmental Sciences, University of L'Aquila, 67100 L'Aquila, Italy.

Journal of Clinical Medicine
|December 9, 2023
PubMed
Summary

Identifying the arrhythmogenic substrate is crucial for successful ventricular arrhythmia (VA) ablation. Merging multiple imaging techniques like MRI and CT can improve pre-procedural planning for VAs.

Keywords:
cardiac computed tomographycardiac magnetic resonanceelectroanatomic mappingintracardiac echographynuclear techniquesventricular tachycardia

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Area of Science:

  • Cardiology
  • Medical Imaging
  • Electrophysiology

Background:

  • Implantable cardioverter defibrillators are primary for sudden cardiac death prevention.
  • Catheter ablation offers a method to modify or prevent sudden cardiac death from ventricular arrhythmias (VAs).
  • Accurate identification of the arrhythmogenic substrate is essential for successful VA ablation and procedural planning.

Purpose of the Study:

  • To review the benefits and limitations of various imaging modalities for assessing the arrhythmogenic substrate in VAs.
  • To highlight the role of imaging techniques in facilitating ablation procedures, particularly for idiopathic VAs.
  • To present a practical workflow and future perspectives for VA ablation.

Main Methods:

  • Review of current imaging modalities: echocardiography (including intracardiac), cardiac magnetic resonance (CMR), cardiac computed tomography (CCT), nuclear techniques, and electroanatomic mapping (EAM).
  • Integration of data from multiple imaging sources.
  • Analysis of their value in substrate assessment and procedural planning for VAs.

Main Results:

  • Each imaging modality offers unique insights into the arrhythmogenic substrate, with distinct advantages and disadvantages.
  • Combining imaging techniques can provide a more comprehensive understanding of the substrate.
  • These integrated approaches are valuable for both non-idiopathic and idiopathic VAs.

Conclusions:

  • A multi-modality imaging approach is recommended for comprehensive assessment of the arrhythmogenic substrate in VAs.
  • Tailored pre-procedural planning using integrated imaging data can optimize catheter ablation success rates.
  • Future research should focus on refining these integrated workflows and exploring novel imaging techniques for VA management.