Correlation analysis
In order to make the results more intuitive, we used the absolute values instead of negative value of three-dimensional strain parameters in the Pearson linear correlation. GLS, GRS, GCS and GAS were negatively related to NT-proBNP in group C (r =-0.866、r =-0.587、r =-0.428、r =-0.600、P <0.001、P =0.001、P =0.020、P =0.010).(shown in Figure 2). And GLS is the only parameter that demonstrated a negative relationship with NT-proBNP in group B (r =-0.642、P <0.010). (shown in Figure 3)