Table 2.

Evaluation of LF, HF, and LF/HF ratio at baseline and at the end-point of the study in the control, pacing, and pacing + SSYX groups

Groups	LF (ms2)	HF (ms2)	LF/HF
Control (n = 6)
Baseline	13.18 ± 3.33	21.70 ± 2.36	0.60 ± 0.15
End-point	12.30 ± 3.36||	22.58 ± 4.45§	0.55 ± 0.14||
Pacing (n = 6)
Baseline	11.88 ± 2.54	20.59 ± 4.98	0.60 ± 0.17
End-point	20.85 ± 3.14†	15.52 ± 3.45*	1.34 ± 0.33†
Pacing + SSYX (n = 6)
Baseline	12.49 ± 2.58	21.64 ± 4.61	0.62 ± 0.24
End-point	15.3 ± 1.89§	19.92 ± 2.75‡	0.77 ± 0.15||

*P<0.05 versus baseline; ^†P<0.01 versus baseline; ^‡P<0.05 versus pacing group; ^§P<0.01 versus pacing group; ^||P<0.001 versus pacing group. LF: Low-frequency component; HF: High-frequency component; SSYX: Shensong Yangxin.