Table 1: Listed are the Lower Limits of Normal for Each Parameter of HRV Corresponding to the Three Different Age Groups. Max/min During Deep Respiration and the Posture Index, which do not Significantly Contribute to Normal Data, are Marked in Grey
Age
n
DR: VC
DR: RMSSD
DR: max-min
VR
Rest: VC
Rest: RMSSD
DR: max/minn
PI
<40
96
4.63
21.03
87.20
1.36
3.57
16.27
1.11
1.06
40-60
71
3.10
12.88
46.00
1.19
2.37
11.29
1.05
1.06
>60
23
2.13
7.24
25.40
1.13
1.40
8.97
1.03
1.03
DR = deep respiration; VM = valsalva manoeuvre; Rest = HRV at rest; PI = posture index , VC = coefficient of variation; RMSSD = root mean square of successive differences.