Table 5.

Average and standard deviation of relative (DSCA)- and absolute PSD distributions for VLF, LF, and HF, according to supine and head up tilt postures in all subjects. Note that DSCA data were obtained from channel 4. * P < 0.05 compared to supine posture.

Freq	DSCA [%]		ECG [ms2]
	Supine	Tilt	Supine	Tilt
VLF	20.61 ± 8.92	25.05 ± 9.26**	–	–
LF	21.48 ± 5.52	23.59 ± 6.11*	522.00 ± 123.82	576.37 ± 242.43
HF	13.53 ± 3.14	13.37 ± 3.22	482.36 ± 234.47	250.76 ± 181.27*