Table 2.

Comparison of cardiac function indexes between the 2 groups ($\overline{\mathit{\chi }}\mathbf{\pm }\mathit{s}$).

Group	LVEDD (mm)		LVEF (%)		BNP (pg/mL)
	Pre-intervention	Post-intervention	Pre-intervention	Post-intervention	Pre-intervention	Post-intervention
Regular group (n = 60)	60.12 ± 5.77	55.39 ± 5.21*	36.02 ± 3.17	46.28 ± 3.98*	689.52 ± 194.78	574.22 ± 166.54*
Observation group (n = 60)	59.85 ± 5.64	51.24 ± 4.98*	36.21 ± 3.34	52.37 ± 4.60*	699.08 ± 186.12	496.08 ± 152.37*
t	0.259	4.460	−0.320	−7.755	−0.275	2.681

^* Compared with the group before intervention, P < .05.