Between-group analysis of longitudinal strain (LS) in the 18 myocardial segments. The average LS is indicated in the centre of each plot. *P < 0.05, **P < 0.01 vs. Group 1; ^##P < 0.01 vs. Group 2, assessed by one-way ANOVA followed by Tukey’s test. (A, n = 10; B, n = 17; C, n = 36). A, anterior; AS, anteroseptal; IS, inferoseptal; I, inferior; IL, inferolateral; AL, anterolateral. LS was expressed as the absolute value of the number.