Table 1.

Changes of hemodynamic indexes.

	Control group (n = 45)	Study group (n = 43)	t	P value
MAP (mmHG)
T1	95.21 ± 11.23	96.24 ± 12.36	−0.409	0.683
T2	94.52 ± 12.31	93.52 ± 10.32	0.412	0.681
T3	90.21 ± 11.32∗	85.42 ± 10.43∗	2.062	0.042
T4	90.29 ± 10.27∗	84.46 ± 12.09∗	2.442	0.017
F	5.241	3.313
P value	0.423	＜0.001
HR (time/min)
T1	79.42 ± 9.32	80.21 ± 9.62	−0.391	0.697
T2	76.24 ± 9.36	78.31 ± 9.24	−1.044	0.300
T3	77.24 ± 9.17	76.36 ± 9.54	0.441	0.660
T4	76.24 ± 9.52	78.52 ± 9.27	−1.138	0.258
F	4.257	5.863
P value	0.291	0.128

^∗ Changes of T3 and T4 indicators are statistically significant compared with T1.