Document Detail

Global Left Atrial Strain in the Prediction of Sinus Rhythm Maintenance after Catheter Ablation for Atrial Fibrillation.
MedLine Citation:
PMID:  25260436     Owner:  NLM     Status:  Publisher    
BACKGROUND: Left atrial (LA) strain is a sensitive measure of LA mechanics. However, its relationship with rhythm outcomes after catheter ablation in patients with atrial fibrillation (AF) is not well established. The aim of this study was to evaluate whether baseline LA global longitudinal strain (LAε) predicts rhythm outcomes in patients who undergo catheter ablation for AF.
METHODS: In 256 patients with AF (paroxysmal, 204; persistent, 52), comprehensive echocardiography was performed with assessment of LAε by using Velocity Vector Imaging to calculate average strain values from apical four- and two-chamber views before ablation (median, 41 days; interquartile range, 1-95 days).
RESULTS: After a median of 8.0 months (interquartile range, 4.0-23.3 months) of follow-up, 149 patients (58%) had maintained sinus rhythm and 107 patients (42%) had recurrence of AF. In our study cohort (mean age 59 ± 11 years; mean left ventricular ejection fraction, 58 ± 10%), impaired total LAε (LAεtotal) was associated with greater left ventricular mass index (r = -0.245, P < .001) and worsening left ventricular diastolic function (ratio of transmitral flow peak early diastolic velocity to peak early diastolic velocity of the mitral annulus: r = -0.357, P < .001; maximal LA volume index: r = -0.393, P < .001). Patients with LAεtotal < 23.2% showed a higher incidence of AF recurrence compared with patients with LAεtotal ≥ 23.2% (log-rank P < .001). In multivariate Cox proportional-hazards analysis, LAεtotal was independently related to rhythm outcomes (hazard ratio, 0.944; 95% confidence interval, 0.915-0.975; P < .001) after AF ablation. Moreover, LAεtotal provided incremental predictive value for rhythm outcomes over clinical features (increment in global χ(2) = 14.63, P < .001).
CONCLUSIONS: In patients with AF, baseline LAεtotal was associated with rhythm outcome after catheter ablation.
Hirohiko Motoki; Kazuaki Negishi; Kenya Kusunose; Zoran B Popović; Mandeep Bhargava; Oussama M Wazni; Walid I Saliba; Mina K Chung; Thomas H Marwick; Allan L Klein
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2014-9-23
Journal Detail:
Title:  Journal of the American Society of Echocardiography : official publication of the American Society of Echocardiography     Volume:  -     ISSN:  1097-6795     ISO Abbreviation:  J Am Soc Echocardiogr     Publication Date:  2014 Sep 
Date Detail:
Created Date:  2014-9-27     Completed Date:  -     Revised Date:  2014-9-28    
Medline Journal Info:
Nlm Unique ID:  8801388     Medline TA:  J Am Soc Echocardiogr     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2014 American Society of Echocardiography. Published by Elsevier Inc. All rights reserved.
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