Post-shock sinus node recovery time is an independent predictor of recurrence after catheter ablation of longstanding persistent atrial fibrillation

Junbeom Park, Jaemin Shim, Jae Sun Uhm, Boyoung Joung, Moon Hyoung Lee, Hui Nam Pak

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)


Background Electro-anatomical remodeling of the atria has been reported to be associated with sinus node dysfunction in patients with atrial fibrillation (AF). We hypothesized that post-shock sinus node recovery time (PS-SNRT: the time from cardioversion to the earliest sinus node activation) is related to the degree of left atrial (LA) remodeling and the clinical outcome of radiofrequency catheter ablation (RFCA) in patients with longstanding persistent AF (L-PeAF). Methods and results We included 117 patients with L-PeAF (82.0% males, 55.4 ± 10.7 years old) who underwent RFCA. PS-SNRTs were measured after internal cardioversion (serial shocks 2, 3, 5, 7, 10, and 15 J) before RFCA. All patients underwent the same ablation design, and we compared regional LA volume (3D-CT imaging) and LA voltage (NavX). Results: 1. During the 13.5 ± 5.8-month follow-up period, it was noted that the patients with recurrent AF 3 months after RFCA (n = 31) had longer PS-SNRTs (1622.90 ± 1196.92 ms vs. 1112.53 ± 690.68 ms, p = 0.005) and greater anterior LA volume (p = 0.032) than those who remained in sinus rhythm. 2. The patients with PS-SNRT ≥ 1100 ms showed lower AF-free rates (58.3%) compared to those with PS-SNRT < 1100 ms (89.5%, p < 0.001). However, shock energy, number of cardioversion, and LA volume were not different between two groups. 3. Multivariate Cox regression analysis demonstrated PS-SNRT ≥ 1100 ms was a significant predictor of clinical recurrence of AF (HR 5.426, 95% CI 2.099-14.028, p < 0.001). Conclusion In patients with L-PeAF, prolonged PS-SNRT is an independent predictor of clinical recurrence of AF after RFCA, but not closely associated with electro-anatomical remodeling of LA.

Original languageEnglish
Pages (from-to)1937-1942
Number of pages6
JournalInternational Journal of Cardiology
Issue number3
Publication statusPublished - 2013 Oct 3
Externally publishedYes

Bibliographical note

Funding Information:
The authors of this manuscript have certified that they comply with the Principles of Ethical Publishing in the International Journal of Cardiology. This work was supported by a grant of the Korea Health 21 R&D Project ( A085136 ), the Ministry of Health and Welfare , and the Basic Science Research Program under the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology, Republic of Korea ( 2010-0010537 ).


  • Atrial fibrillation
  • Catheter ablation
  • Left atrium remodeling
  • Post-shock sinus recovery time

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine


Dive into the research topics of 'Post-shock sinus node recovery time is an independent predictor of recurrence after catheter ablation of longstanding persistent atrial fibrillation'. Together they form a unique fingerprint.

Cite this