Right atrial focal atrial fibrillation: Electrophysiologic characteristics and radiofrequency catheter ablation

Shih Ann Chen, Ching Tai Tai, Wen Chung Yu, Yi Jen Chen, Chin Feng Tsai, Ming Hsiung Hsieh, Chien Cheng Chen, V. S. Prakash, Yu An Ding, Mau Song Chang

Research output: Contribution to journalArticlepeer-review

159 Citations (Scopus)


Focal Atrial Fibrillation. Introduction: Information about focal atrial fibrillation (AF) originating from the right atrium has not been well described. The purposes of this study were to demonstrate the electrophysiologic characteristics and radiofrequency catheter ablation in patients who had right atrial focal AF. Methods and Results: From January 1996 to September 1998, 172 patients with clinically documented attacks of paroxysmal AF were referred to this institution for electrophysiologic study and/or radiofrequency catheter ablation. Anterior free wall, crista terminalis, and right and left superior pulmonary veins were mapped simultaneously. Eight patients (4.7%) had right atrial focal AF, consistent activation sequence, irregular fibrillation interval (mean fibrillation interval: 164 ± 11 msec), and episodes of exit block from the initiating foci observed. The presumed ablation site was chosen on the basis of the earliest bipolar activity relative to an atrial electrogram reference during the initiation of AF. After application of 2 ± 1 radiofrequency pulses, AF was eliminated without recurrence during the follow-up period (mean: 14 ± 8 months; range: 3 to 25). Twenty-four-hour Holter monitoring showed that the number of atrial premature beats decreased significantly at the 3-month follow-up (4,216 ± 411 vs 135 ± 14 beats/day). Conclusion: Right atrial focal AF is one subgroup of focal AF, and it can be cured by radiofrequency catheter ablation.

Original languageEnglish
Pages (from-to)328-335
Number of pages8
JournalJournal of Cardiovascular Electrophysiology
Issue number3
Publication statusPublished - 1999


  • Ablation
  • Focal atrial fibrillation

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine
  • Physiology (medical)


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