Table 2

Time and frequency domains parameters

HRV and BP parameters
Arithmetic mean (SD)
Geometric Mean
Range

VLF (ms2)§
890 (2108)
690/6.5
45 – 5999
LF (ms2)§
574 (2006)
376/5.9
16 – 6596
HF (ms2)§
206 (726)
134/4.9
16 – 2329
LF/HF§
3.2 (5.4)
2.8
0.4 – 13
NN (ms)
810 (364)

557 – 1167
SDNN (ms)§
80 (84)
76
24 – 226
SDANN (ms)§
51 (67)
47
12 – 189
RMSSD (ms)§
30 (37)
28
12 – 93
PNN50 (%) §
10 (31)
5
0 – 57
SBP (mm Hg)
123 (37)

85 – 187
DBP (mm Hg)
75 (21)

55 – 111
PP (mm Hg)
48 (27)

23 – 94

§ Variables not normally distributed; for VLF, LF and HF, the Ln mean is also shown; SBP: systolic blood pressure, DBP: diastolic blood pressure, PP: pulse pressure.

Valera et al. Environmental Health 2008 7:29   doi:10.1186/1476-069X-7-29