Table 2.

Effect of stem cell treatment on heart rate variability in all three experimental groups.

	Saline (n = 10)	MSC (n = 11)	pMSC (n = 10)
Variance (ms2)	24.5 ± 3.8	22.3 ± 4.2	27.7 ± 4.1
LF (ms2)	1.7 ± 0.4	0.4 ± 0.1∗	1.5 ± 0.4
LF (nu)	13.1 ± 2.4	4.3 ± 0.9∗	8.2 ± 1.9
HF (ms2)	7.4 ± 1.2	6.8 ± 1.4	10.7 ± 1.7
HF (nu)	69.6 ± 2.9	71.8 ± 3.1	73.4 ± 2.9
LF/HF ratio	0.2 ± 0.03	0.07 ± 0.02	0.13 ± 0.03

LF = low frequency power spectral density, HF = high frequency power spectral density, nu = normalized units, and ^∗ p < 0.05 versus saline.