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The mechanism of mitral regurgitation assessed by preprocedural echocardiography is associated with the outcome of catheter ablation in patients with paroxysmal atrial fibrillation

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Abstract

Background

Mitral regurgitation (MR) is generally classified as either primary (organic) or secondary (functional). Although patients with atrial fibrillation (AF) often exhibit MR, the relation between the etiology of MR and the outcome of catheter ablation (CA) remains unknown. We conducted this study in order to elucidate this association.

Methods

Among 1330 consecutive paroxysmal AF patients who underwent initial catheter ablation in our institution, 92 patients (62 men, mean age 65 ± 7 years) who had moderate or severe MR were included in this study; 46 were classified to have primary and the remaining 46 to have secondary MR by preoperative echocardiography. These patients were prospectively monitored after the CA.

Results

During a mean follow-up period of 27.9 ± 28.8 months, AF recurred in 26/46 (56.6 %) of primary MR patients and in 15/46 (32.6 %) of those with secondary MR (P < 0.02). Although univariate analysis found that diabetes, left atrial volume indexed by body surface area (LAVI), and primary MR were significantly associated with AF recurrence, primary MR (hazard ratio (HR), 2.47; 95 % confidence interval (CI), 1.30–4.88; P = 0.006) and LAVI (HR, 1.03/1 mL/m2 increase; 95 % CI, 1.00–1.06; P = 0.03) remained significant predictors on multivariate analysis. The AF recurrence-free rate was lower in patients with primary MR after both the initial and final CA.

Conclusion

In patients with paroxysmal AF and moderate or severe MR, primary MR may increase the risk of AF recurrence after the initial and final CA.

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Authors and Affiliations

  1. Cardiovascular Centre, Yokosuka Kyosai Hospital, 1-16 Yonegahama-Street, Yokosuka, 238-8558, Japan

    Masateru Takigawa, Taishi Kuwahara, Atsushi Takahashi, Kenji Okubo, Emiko Nakashima, Yuji Watari, Kazuya Yamao, Jun Nakajima, Yasuaki Tanaka, Katsumasa Takagi, Shigeki Kimura & Hiroyuki Hikita

  2. Heart Rhythm Centre, Tokyo Medical and Dental University, Tokyo, Japan

    Masateru Takigawa & Kenzo Hirao

  3. Department of Cardiovascular Medicine, Tokyo Medical and Dental University, Tokyo, Japan

    Masateru Takigawa & Mitsuaki Isobe

Authors
  1. Masateru Takigawa
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  2. Taishi Kuwahara
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  3. Atsushi Takahashi
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  4. Kenji Okubo
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  5. Emiko Nakashima
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  6. Yuji Watari
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  7. Kazuya Yamao
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  8. Jun Nakajima
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  9. Yasuaki Tanaka
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  12. Hiroyuki Hikita
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  14. Mitsuaki Isobe
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Corresponding author

Correspondence to Masateru Takigawa.

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Takigawa, M., Kuwahara, T., Takahashi, A. et al. The mechanism of mitral regurgitation assessed by preprocedural echocardiography is associated with the outcome of catheter ablation in patients with paroxysmal atrial fibrillation. J Interv Card Electrophysiol 46, 299–306 (2016). https://doi.org/10.1007/s10840-016-0123-8

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  • DOI: https://doi.org/10.1007/s10840-016-0123-8

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