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Impacts of the body size on the left atrial wall thickness and atrial fibrillation recurrence after catheter ablation

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Abstract

The increased body size correlates with the occurrence of atrial fibrillation (AF); however, the impact of the body size on the AF recurrence after ablation remains unclear. We enrolled 283 AF patients (179 paroxysmal, 51 persistent, and 53 long-standing persistent) who received ablation and assessed the correlation between the body surface area (BSA) and the AF recurrence. Furthermore, we measured the left atrial wall thickness using computed tomography. During the 12-month follow-up period, the AF freedom rates for patients with paroxysmal AF, persistent AF, and long-standing persistent AF were 83%, 76%, and 77%, respectively. The left atrial dimension, BSA, and body mass index (BMI) were higher in the AF-recurrent group compared with the AF-free group (left atrial dimension: 44.1 ± 7.5 mm vs. 41.7 ± 6.5 mm, P = 0.019; BSA: 1.81 ± 0.20 m2 vs. 1.72 ± 0.19 m2, P = 0.002; BMI 25.0 ± 3.2 kg/m2 vs. 24.0 ± 3.2 kg/m2, P = 0.035). The multivariate analysis revealed that only the BSA was an independent predictor of the AF recurrence after ablation (hazard ratio 6.843; 95% confidence interval 1.523–30.759, P = 0.012). The BSA significantly correlated with the left atrial wall thickness (R = 0.306, P < 0.001), and the left atrial wall thickness was higher in the AF-recurrent group compared with the AF-free group (2.00 ± 0.20 mm vs. 1.87 ± 0.17 mm, P < 0.001). The large body size correlates with the AF recurrence after ablation, which could be attributed to an increase in the left atrial wall thickness.

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Authors and Affiliations

  1. Second Department of Internal Medicine, University of Toyama, 2630 Sugitani, Toyama, 930-0194, Japan

    Yosuke Nakatani, Tamotsu Sakamoto, Yoshiaki Yamaguchi, Yasushi Tsujino, Naoya Kataoka & Koichiro Kinugawa

  2. Nishida Medical Clinic, Toyama, Japan

    Kunihiro Nishida

  3. Alpen Murotani Clinic, Toyama, Japan

    Koichi Mizumaki

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  1. Yosuke Nakatani
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  2. Tamotsu Sakamoto
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  3. Yoshiaki Yamaguchi
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  4. Yasushi Tsujino
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  5. Naoya Kataoka
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Correspondence to Yosuke Nakatani.

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Nakatani, Y., Sakamoto, T., Yamaguchi, Y. et al. Impacts of the body size on the left atrial wall thickness and atrial fibrillation recurrence after catheter ablation. Heart Vessels 34, 1351–1359 (2019). https://doi.org/10.1007/s00380-019-01357-6

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