Correlation analysis showed that the cardiac function parameters EF , FS were negatively correlated with CD24 cells and CD19CD24 cells , that E/A was positively correlated with BTLA , that A peak velocity was positively related to CD19 cells , that EF was positively related to ROS , that SV was positively related with MDA , SOD , that E peak velocity was negatively correlated with TAOC .