Obokata, M and Negishi, K and Kurosawa, K and Tateno, R and Tange, S and Arai, M and Amano, M and Kurabayashi, M, Left atrial strain provides incremental value for embolism risk stratification over CHA2DS2-VASc score and indicates prognostic impact in patients with atrial fibrillation, Journal of the American Society of Echocardiography, 27, (7) pp. 709-716.e4. ISSN 0894-7317 (2014) [Refereed Article]
Copyright 2014 American Society of Echocardiography
Background: The aim of this study was to investigate whether left atrial (LA) strain has incremental value over the CHA2DS2-VASc score for stratifying the risk for embolism in patients with atrial fibrillation (AF) and whether LA strain predicts poststroke mortality.
Methods: Consecutive patients with paroxysmal or persistent AF with acute embolism (82 patients) or without (204 controls) were prospectively enrolled. Global peak LA longitudinal strain during ventricular systole (LAS) was assessed during AF rhythm. Global LAS was compared between the groups in the first cross-sectional study. Then, the 82 patients with acute embolism were prospectively followed during the second prospective cohort study.
Results: Global LAS was lower in patients with acute embolism than in controls (P < .001). Global LAS < 15.4% differentiated patients with acute embolism from controls, with an area under the curve of 0.83 (P < .0001). In multivariate analysis, global LAS was independently associated with acute embolism (odds ratio, 0.74; 95% confidence interval, 0.67-0.82; P < .001) and had an incremental value over the CHA2DS2-VASc score (P < .0001). Furthermore, 26 patients with acute embolisms died during a median follow-up period of 425 days. Global LAS independently predicted mortality after embolism.
Conclusions: In this observational study, LA strain provided incremental diagnostic information over that provided by the CHA2DS2-VASc score, suggesting that LA strain analysis could improve the current risk stratification of embolism in patients with AF. LA strain can also predict poststroke mortality.
|Item Type:||Refereed Article|
|Keywords:||atrial fibrillation, left atrial function, left atrial strain, stroke, speckle-tracking|
|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)|
|Web of Science® Times Cited:||39|
|Deposited By:||Menzies Institute for Medical Research|
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