Fig. 3

Comparison of longitudinal layer-specific strains and circumferential layer-specific strains between the POI group and control group. GLSendo, GLSmid, GLSepi, GCSendo, GCSmid and GCSepi were all lower in the POI group. Similarly, the longitudinal and circumferential strain parameters of the two groups all exhibited a decreasing trend from the subendocardium to the subepicardium.*P < 0.05, **P < 0.001. Standard error was the measure of sampling error