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Composite figures showing measurement of peak atrial longitudinal strain (A) and strain rate (B) using speckle tracking echocardiography. AVO = aortic valve opening, AVC = aortic valve closure, MVO = mitral valve opening, MVC = mitral valve closure, BA = basal anterior, BI = basal inferior, MA = mid-anterior, MI = mid-inferior, ApA = apical anterior, ApI = apical inferior.
