NT-proBNP ( $\overline{x}\pm s$ )

LVEF ( $\overline{x}\pm s$ )

对照组

462.11 ± 225.26

52.57±5.78

观察组

816.13 ± 286.38

52.15±6.56

t

5.465

−0.264

P

<0.001

0.792