Role of atrial wall thickness in wave-dynamics of atrial fibrillation

Jun Seop Song, Jin Wi, Hye Jeong Lee, Minki Hwang, Byounghyun Lim, Tae Hoon Kim, Jae Sun Uhm, Boyoung Joung, Moon Hyoung Lee, Jeong Wook Seo, Hui Nam Pak

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Abstract

Background/Aims: Atrial anatomy and thickness may affect the electrical wave-dynamics of atrial fibrillation (AF). We explored the relationship between left atrial (LA) wall thickness (LAWT) or LA geometry and AF wave-dynamics. Methods: We included 15 patients with persistent AF (age, 62.3 ± 11.9 years) who underwent AF catheter ablation. We measured the LAWT, LA endocardial curvature, and SD-curvature (surface bumpiness) from preprocedural computed tomography images. We compared those anatomical characteristics with electrophysiologic parameters such as dominant frequency (DF), Shannon entropy (ShEn), or complex fractionated atrial electrogram (CFAE)-cycle length (CL), calculated from intracardiac bipolar electrograms (300–500 points, 5 s), acquired during ablation procedures. Results: 1. LAWT (excluding fat) varied widely among patients, locations, and types of AF. LAWT was inversely correlated with LA volume (r = -0.565, p = 0.028) and positively correlated with SD-curvature (r = 0.272, p < 0.001). 2. LAWT was positively correlated with ShEn (r = 0.233, p < 0.001) and negatively correlated with CFAE-CL (r = -0.107, p = 0.038). 3. In the multivariate linear regression analyses for AF wave-dynamics parameters, DF (β = -0.29 [95% CI -0.44–-0.14], p < 0.001), ShEn (β = 0.19 [95% CI 0.12–0.25], p < 0.001), and CFAE-CL (β = 7.49 [95% CI 0.65–14.34], p = 0.032) were independently associated with LAWT. Conclusion: Regional LAWT is associated with LA structural features, and has significant correlations with the wave-dynamics parameters associated with electrical wavebreaks or rotors in patients with persistent AF.

Original languageEnglish
Article numbere0182174
JournalPloS one
Volume12
Issue number8
DOIs
Publication statusPublished - 2017 Aug

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All Science Journal Classification (ASJC) codes

  • Biochemistry, Genetics and Molecular Biology(all)
  • Agricultural and Biological Sciences(all)

Cite this

Song, J. S., Wi, J., Lee, H. J., Hwang, M., Lim, B., Kim, T. H., Uhm, J. S., Joung, B., Lee, M. H., Seo, J. W., & Pak, H. N. (2017). Role of atrial wall thickness in wave-dynamics of atrial fibrillation. PloS one, 12(8), [e0182174]. https://doi.org/10.1371/journal.pone.0182174