PE3-049 The Relationship between Internal Cardioversion Threshold or Post-Cardioversion Sinus Node Recovery Time and Atrial Structural or Autonomic Neural Remodeling in Persistent Atrial Fibrillation

Junbeom Park, Hoyoun Won, Hee Sun Mun, Jin Wee, Jae Min Shim, Jae Sun Uhm, Hye Jin Hwang, Jong Youn Kim, Boyoung Joung, Moon Houng Lee, Hui Nam Pak

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Background: We hypothesized that cardioversion (CV) threshold and post-CV sinus node recovery time (PC-SNRT) are related with cardiac autonomic nerve function or atrial structural remodeling in persistent atrial fibrillation (PeAF). Methods: We included 74 patients with PeAF (62males, 54.8±10.5years old) who underwent radiofrequency catheter ablation (RFCA) and maintained sinus rhythm at the time of 3rd month Holter without taking any anti-arrhythmic drug or beta-blocker. At the beginning of RFCA, we delivered internal CV 2, 3, 5, 7, and 10J serially, and measured CV threshold and PC-SNRT. Results: 1. The patients with CHADS2 score>=1 showed higher CV threshold than those with 0 (8.3 ±2.1J vs. 6.2±2.5J, p=0.034). 2. CV threshold of the patients with left atrial(LA) volume>=120mL was significantly higher than those of patients with<120mL(8.2±2.2J vs. 6.4±2.7J, p=0.034). 3. PC-SNRT of the patients with LA-AP diameter (>=45mm) by echocardiography were significantly longer than that of the patients with<45mm (1422.2±1031.7ms vs. 1060.2±448.2ms, p=0.05). 4. PC-SNRT was correlated with 3rd month heart rate variability(HRV) including SDNN (R=0.400, p=0.005), HF (R=0.480, p=0.001), but not related with clinical recurrence of AF after RFCA. Conclusion: Both CV threshold and PC-SNRT were significantly greater in patients with atrial structural remodeling, but were not related with clinical outcome of RFCA in PeAF.

Original languageEnglish
Number of pages1
Journaljournal of arrhythmia
Publication statusPublished - 2011 Jan 1


All Science Journal Classification (ASJC) codes

  • Cardiology and Cardiovascular Medicine

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