Abstract
Background: Strain imaging by two-dimensional speckle tracking echocardiography (2D STE) has been applied across multiple clinical settings providing incremental diagnostic and prognostic information over conventional indices of myocardial function. Average global longitudinal strain (GLS) detects subclinical left ventricular (LV) systolic dysfunction, but regional longitudinal strain (RLS) patterns are also utilised in the assessment of undifferentiated LV hypertrophy. Apical foreshortening (FS) can result in overestimation of systolic function (ejection fraction); however, its impact on average GLS values has not been evaluated.
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