Progressive remodeling of the atrial substrate - A novel finding from consecutive voltage mapping in patients with recurrence of atrial fibrillation after catheter ablation

Li Wei Lo, Ching Tai Tai, Yenn Jiang Lin, Shih Lin Chang, Wanwarang Wongcharoen, Sheng Hsiung Chang, Ming Hsiung Hsieh, Ta Chuan Tuan, Ameya R. Udyavar, Yi Jen Chen, Hsuan Ming Tsao, Shih Ann Chen

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Atrial Substrate in Recurrent Atrial Fibrillation. Background: Atrial substrate properties have been demonstrated to be related to atrial arrhythmias. This study investigated whether the atrial substrate exhibits progressive remodeling in patients with recurrence of atrial fibrillation (AF) after catheter ablation. Methods and Results: Fifteen consecutive AF patients (52 ± 12 years old, 12 males) underwent the same mapping technique (NavX, St. Jude Medical, Minnetonka, MN, USA) and same ablation technique for primary AF and recurrence of AF (170 ± 66 days after the first procedure). The bipolar mean peak-to-peak voltage (PPV) of the global left atrium during sinus rhythm significantly decreased in the second procedure (2.25 ± 0.62 vs. 1.79 ± 0.60 mV, P = 0.008). Also, the percentage of the surface area of the low voltage zone (LVZ; less than 0.5 mV) in the left atrium increased from 6 ± 4% to 13 ± 6% (P = 0.001) in the second procedure. There was no significant change in the right atrial bipolar mean PPV or surface area of the LVZ in the second procedure. Conclusion: Atrial substrate remodeling with a progressive decrease in the left atrial voltage was demonstrated in patients with recurrent AF.

Original languageEnglish
Pages (from-to)258-265
Number of pages8
JournalJournal of Cardiovascular Electrophysiology
Issue number3
Publication statusPublished - Mar 2007



  • Atrial fibrillation
  • Atrial substrate
  • Electroanatomical remodeling
  • Voltage mapping

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine
  • Physiology

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