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Left atrial appendage flow velocity after successful ablation of persistent atrial fibrillation: clinical perspective from transesophageal echocardiographic assessment during sinus rhythm.

Abstract：

BACKGROUND:Left atrial appendage flow velocity (LAAFV) is a predictor of thromboembolism in atrial fibrillation (AF) patients, as well as CHA2DS2-VASc score. However, little is known about LAAFV in sinus rhythm (SR) after catheter ablation. The aim of this study was to determine clinical predictors of low LAAFV in patients in whom stable SR had been maintained after catheter ablation for persistent AF. METHODS:The study comprised 104 patients with persistent AF (median AF duration 24 months) in whom SR had been achieved and maintained for at least 6 months after the final ablation procedure. Transesophageal echocardiography was performed to assess LAAFV during SR after ablation. Lower LAAFV was defined as ≤40 cm/s. RESULTS:Mean LAAFV before ablation was 29 ± 11 cm/s (range 10-67 cm/s). In 23 (22%) patients, LAAFV remained low even after being in SR for at least 6 months. Multiple logistic regression analysis showed that CHA2DS2-VASc scores of ≥2 (odds ratio 2.18, 95% CI 1.19-3.99, P = .012) was an independent predictor of lower LAAFV after successful ablation. Seventeen (74%) of the 23 patients with low LAAFV during SR presented CHA2DS2-VASc scores of ≥2 complicated by spontaneous echo contrast during AF. CONCLUSIONS:Long-term maintenance of SR after catheter ablation for persistent AF does not guarantee LAAFV recovery. The CHA2DS2-VASc score appears to predict poor recovery of LAAFV. Further studies are necessary to confirm the usefulness of LAAFV during SR as a surrogate marker predicting thromboembolism in patients after AF ablation.

journal_name

Am Heart J

journal_title

American heart journal

authors

Kusa S,Komatsu Y,Taniguchi H,Uchiyama T,Takagi T,Nakamura H,Miyazaki S,Hachiya H,Iesaka Y

doi

10.1016/j.ahj.2014.11.009

subject

Has Abstract

pub_date

2015-02-01 00:00:00

pages

211-21

issue

2

eissn

0002-8703

issn

1097-6744

pii

S0002-8703(14)00671-1

journal_volume

169

pub_type

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