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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.
Electrocardiogram Fundamentals01:28

Electrocardiogram Fundamentals

Introduction
An electrocardiogram (ECG) is a diagnostic tool for identifying cardiac conditions such as arrhythmias, conduction abnormalities, and myocardial ischemia.
Definition
An electrocardiogram (ECG) visualizes the heart's electrical activity by tracing the electrical movement associated with each heartbeat on a graph or monitor. As the heart beats, an electrical wave passes through it, correlating with the cardiac cycle events.
Parts of an ECG
An ECG utilizes electrodes on the skin to...
Dysrhythmias V: Evaluating Dysrhythmias01:30

Dysrhythmias V: Evaluating Dysrhythmias

Dysrhythmias, also known as arrhythmias, are disturbances in the heart's rhythm that range from benign to life-threatening. A thorough evaluation is crucial for appropriate management and involves a comprehensive medical history, physical examination, and various diagnostic tests.Medical HistorySymptoms: Collect detailed information on palpitations, dizziness, syncope, chest pain, and fatigue. Note their onset, frequency, and triggers.Previous Cardiac Issues: Document any history of heart...
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...

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Updated: May 23, 2026

Electrophysiological Assessment of Murine Atria with High-Resolution Optical Mapping
08:19

Electrophysiological Assessment of Murine Atria with High-Resolution Optical Mapping

Published on: February 22, 2018

Electro-anatomic mapping systems in arrhythmias.

Christian Knackstedt1, Patrick Schauerte, Paulus Kirchhof

  • 1Department of Cardiology, Pneumology and Vascular Medicine, RWTH University Aachen, Aachen, Germany.

Europace : European Pacing, Arrhythmias, and Cardiac Electrophysiology : Journal of the Working Groups on Cardiac Pacing, Arrhythmias, and Cardiac Cellular Electrophysiology of the European Society of Cardiology
|November 5, 2008
PubMed
Summary
This summary is machine-generated.

Electroanatomic mapping systems enhance complex arrhythmia ablation by integrating 3D catheter localization and electrogram data. Their use in atrial fibrillation (AF) management prioritizes safety through non-fluoroscopic visualization and integration with cardiac imaging.

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Real-Time Cardiac Mapping with a Noninvasive Imageless Electrocardiographic Imaging System
10:17

Real-Time Cardiac Mapping with a Noninvasive Imageless Electrocardiographic Imaging System

Published on: April 11, 2025

Area of Science:

  • Cardiac Electrophysiology
  • Interventional Cardiology
  • Medical Imaging

Background:

  • Electroanatomic mapping systems have been pivotal in complex interventional ablation for over a decade.
  • Initially used for identifying difficult ablation targets in ventricular tachycardias and atypical atrial flutters.
  • Recent applications include guiding pulmonary vein isolation for atrial fibrillation (AF) management.

Purpose of the Study:

  • To review the functionalities and applications of electroanatomic mapping systems in interventional procedures.
  • To highlight the evolving role of these systems in managing complex arrhythmias, particularly AF.
  • To discuss current and future integration of imaging modalities for improved ablation guidance.

Main Methods:

  • Integration of non-fluoroscopic catheter localization in 3D space.
  • Analysis and 3D display of electrogram data, including activation sequences and voltage mapping ('scar tissue').
  • Fusion of electroanatomic data with non-invasive cardiac imaging (CT, MRI).

Main Results:

  • Electroanatomic mapping systems provide detailed 3D visualization of cardiac electrical activity and anatomy.
  • In AF treatment, systems integrate anatomical images with catheter visualization, enhancing safety and reducing fluoroscopy time.
  • Integration of electrogram data is crucial for understanding re-entrant circuits in complex arrhythmias.

Conclusions:

  • Electroanatomic mapping systems are essential tools for complex ablation procedures, offering advanced visualization and guidance.
  • Their application in AF management is driven by safety benefits, including reduced radiation exposure and protection of critical structures.
  • Future advancements may incorporate MRI and 3D ultrasound for radiation-free anatomical imaging and scar characterization.