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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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Related Experiment Video

Updated: Apr 9, 2026

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

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

Dual-Modality Focal Ablation for Refractory Ventricular Summit Ectopy: First-in-Human Experience.

Narut Prasitlumkum¹, Xiaoke Liu¹, Benjamin Hibbert¹

¹Department of Cardiovascular Medicine, Mayo Clinic, Rochester, Minnesota, USA.

JACC. Case Reports

|April 7, 2026

Summary

This summary is machine-generated.

This study shows a new dual-modality catheter successfully treated refractory premature ventricular contractions (PVCs) originating from the left ventricular summit. The novel approach offers a promising option for challenging ventricular ablation cases.

Area of Science:

Cardiology
Electrophysiology
Medical Devices

Background:

Catheter ablation of the left ventricular (LV) summit is challenging due to complex anatomy and proximity to coronary arteries.

Keywords:

LV summit PFA RFA dual energy first-in-human

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Previous ablation methods have shown variable outcomes, necessitating innovative approaches.