Correlation between longitudinal strain (LS) assessed by 2D speckle-tracking echocardiography and native T1 (A, B) and extracellular volume (ECV) (C, D) assessed by cardiac magnetic resonance imaging in the six segments of the basal and mid-ventricular slices. A, anterior; AS, anteroseptal; IS, inferoseptal; I, inferior; IL, inferolateral; AL, anterolateral. LS was expressed as the absolute value of the number.