Prediction of improvement in left atrial function index after catheter ablation for atrial fibrillation

Takahiko Nagase, Ritsushi Kato, Shintaro Nakano, Yuichirou Shiki, Sayaka Tanaka, Yoshifumi Ikeda, Shiro Iwanaga, Shigeyuki Nishimura, Kazuo Matsumoto

研究成果: ジャーナルへの寄稿学術論文査読

6 被引用数 (Scopus)


Purpose: Although left atrial function index is reportedly a possible predictor of hospitalization for heart failure and of stroke irrespective of the presence or not of atrial fibrillation (AF), the effects of catheter ablation on left atrial function index have not yet been reported. Methods: We performed catheter ablation on 55 patients (age 56.6 ± 9.6 years; 44 men; 30 with paroxysmal and 25 with persistent, long-standing AF) and evaluated them by transthoracic echocardiography preoperatively and 3 monthly for 12–24 months after catheter ablation. We then compared clinical characteristics and echocardiographic variables before catheter ablation between two groups: the 42 subjects with the most recent left atrial function index <30 and the 13 in which it was ≥30. Results: Left atrial function index improved after catheter ablation in both groups, plateauing 6 months after the procedure. Univariate analysis showed statistically significant differences in the prevalence of chronic AF and left atrial emptying fraction, diameter, and maximum and minimum volume (prevalence of chronic AF, p < 0.05; others, p < 0.01) between the groups. Multivariate analysis showed that only maximum left atrial volume predicts left atrial function index after catheter ablation (p < 0.05). In addition, we used ROC analysis to calculate a cutoff value for LA maximum volume as a good predictor and found that a good cutoff value was 63.5 mL, the sensitivity and specificity being 0.75 and 0.75, respectively. Conclusions: Catheter ablation improves left atrial function index. However, in patients with left atrial maximum volume of over 63.5 mL on echocardiography, the index did not recover to within the normal range after catheter ablation.

ジャーナルJournal of Interventional Cardiac Electrophysiology
出版ステータス出版済み - 01-11-2015

All Science Journal Classification (ASJC) codes

  • 循環器および心血管医学
  • 生理学(医学)


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