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Bland-Altman plots demonstrate variability of inter-observer measures for: percent shortening fraction (SF%, Panel A); percent ejection fraction (EF%, Panel B); myocardial performance index (MPI, inter-observer differences in Panel C and inter-method (PWD vs. TDI) in Panel D); average circumferential (CS%, Panel E) and longitudinal strain (LS%, Panel F). The red dashed line represents the mean bias and the shaded area indicates the area between the limits of agreement.
