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Patchy Earliest Activation on Near-Field Annotation Mapping: A Pitfall in Ablation of Premature Ventricular

Yusuke Sakamoto1, Hiroyuki Osanai1, Eiji Yoshida1

  • 1Department of Cardiology Tosei General Hospital Seto Aichi Japan.

Journal of Arrhythmia
|April 23, 2026
PubMed

Keywords:
catheter ablationfirst deflection mappingnear‐field mappingpremature ventricular complexesright ventricular outflow tract

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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...