The Analysis of How Apnea Influences the Autonomic Nervous System Using Short-Term Heart Rate Variability Indices
Table 1
Comparison of HRV indices with different data lengths under the normal respiratory condition.
HRV indices
10 min
5 min
2 min
40 s
15 s
Mean-RR (ms)
870.49 ± 19.2
867.16 ± 18.83
864.9 ± 18.89
870.61 ± 21.44
874.51 ± 22
SDNN (ms)
53.34 ± 3.9
50.35 ± 4.1
49.26 ± 4.66
43.82 ± 5.17
41.86 ± 5.44
pNN50 (%)
20.85 ± 2.9
21.22 ± 3
21.05 ± 3.16
17.37 ± 2.95
15.8 ± 3.12
rMSSD (ms)
43.41 ± 3.79
41.59 ± 3.95
41.1 ± 4
40.63 ± 5.17
39.28 ± 5.22
nLF (%)
47.88 ± 2.66
47.95 ± 2.68
50.68 ± 2.92
45.83 ± 3.29
43.79 ± 3.11
nHF (%)
52.12 ± 2.66
52.05 ± 2.68
49.34 ± 2.92
54.17 ± 3.29
56.21 ± 3.11
LF/HF
1.24 ± 0.17
1.32 ± 10.17
1.46 ± 0.19
1.37 ± 0.23
1.13 ± 0.16
SD1
37.7 ± 2.75
35.57 ± 2.89
34.77 ± 3.26
31.06 ± 3.7
26.95 ± 3.57
SD2
65.34 ± 4.79
61.69 ± 5.03
60.37 ± 5.72
53.62 ± 6.3
47.39 ± 6.04
α1
0.96 ± 0.03
0.95 ± 0.03
0.97 ± 0.04
0.93 ± 0.05
1.07 ± 0.07
Values are expressed as mean ± SE. Statistical significance between other lengths of the respiratory condition with a length of 10 minutes: significant.
