Table 5.

Comparison of changes in cardiopulmonary function of the two groups before and after treatment (x̅ ± s)

Group	LVEF (%)		NT-proBNP (pg/L)
	Before treatment	After treatment	Before treatment	After treatment
Control group (n=46)	39.41±4.24	44.67±5.35*	1114.82±257.18	556.72±131.45*
Observation group (n=46)	38.37±3.96	49.82±5.14*	1137.44±243.52	423.94±108.13*
t	1.2158	4.7080	0.4332	5.2921
P	0.2272	<0.0001	0.6659	<0.0001

Note: Compared with pre-treatment;

^* P<0.05.