Low left atrial appendage flow velocity predicts recurrence of atrial fibrillation after catheter ablation of persistent atrial fibrillation

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• 作者：Takashi Kanda ; MD^a ; Masaharu Masuda ; MD^a ; ^{masuda-masaharu@kanrou.net" class="auth_mail" title="E-mail the corresponding author} ; Akihiro Sunaga ; MD^a ; Masashi Fujita ; MD ; PhD^a ; Osamu Iida ; MD^a ; Shin Okamoto ; MD^a ; Takayuki Ishihara ; MD^a ; Tetsuya Watanabe ; MD ; PhD^b ; Mitsuyoshi Takahara ; MD ; PhD^c ; Yasushi Sakata ; MD ; PhD ; FJCC^d ; Masaaki Uematsu ; MD ; PhD ; FJCC^a
• 关键词：Persistent atrial fibrillation ; Radio frequency catheter ablation ; Left atrial appendage flow velocity ; Recurrence ; Transesophageal echocardiography
• 刊名：Journal of Cardiology
• 出版年：2015
• 出版时间：November 2015
• 年：2015
• 卷：66
• 期：5
• 页码：377-381
• 全文大小：668 K

文摘

Recurrence after catheter ablation of persistent atrial fibrillation (AF) remains an unsolved issue. This study aimed to explore the association between the left atrial appendage peak flow velocity (LAAV) and AF recurrence after ablation in persistent AF patients.

Methods

Fifty-three consecutive patients who underwent an initial catheter ablation of persistent AF were enrolled [age, 65 ± 10 years; male, 42 (79%)]. The LAAV was obtained by transesophageal echocardiography before ablation. All the patients underwent pulmonary vein isolation and were followed up for 12 months. The LAAV and other clinical factors (AF duration, CHA₂DS₂VASc score, left atrial diameter, left atrial volume, and left ventricular ejection fraction) were tested using a Cox proportional hazards regression analysis as predictors of AF recurrence during the 1-year follow-up.

Results

AF recurrence occurred in 16 (30%) patients. The patients with AF recurrences had lower LAAVs (23.3 ± 7.2 cm/s vs. 33.3 ± 15.1 cm/s, p = 0.002) than those without AF recurrence. In the multivariable analysis, a low LAAV independently predicted AF recurrence (hazard ratio, 3.04; 95% confidence interval, 1.05–8.79; p = 0.040). A Kaplan–Meier analysis also demonstrated a lower survival rate free from AF recurrence in the low LAAV group than in the high LAAV group (p = 0.030).

Conclusion

A low LAAV was associated with AF recurrence after the initial catheter ablation of persistent AF.