Motoki, H and Negishi, K and Kusunose, K and Popovic, ZB and Bhargava, M and Wazni, OM and Saliba, WI and Chung, MK and Marwick, TH and Klein, AL, Global left atrial strain in the prediction of sinus rhythm maintenance after catheter ablation for atrial fibrillation, Journal of the American Society of Echocardiography, 27, (11) pp. 1184-1192. ISSN 0894-7317 (2014) [Refereed Article]
Copyright 2014 American Society of Echocardiography
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.
|Item Type:||Refereed Article|
|Keywords:||Atrial fibrillation; Atrial function; Catheter ablation; Echocardiography|
|Research Division:||Medical and Health Sciences|
|Research Group:||Cardiorespiratory Medicine and Haematology|
|Research Field:||Cardiology (incl. Cardiovascular Diseases)|
|Objective Group:||Clinical Health (Organs, Diseases and Abnormal Conditions)|
|Objective Field:||Cardiovascular System and Diseases|
|UTAS Author:||Negishi, K (Dr Kazuaki Negishi)|
|UTAS Author:||Marwick, TH (Professor Tom Marwick)|
|Web of Science® Times Cited:||43|
|Deposited By:||Menzies Institute for Medical Research|
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