ABCDEFGHIJKLMNOPQRSTUVW
1
Introduction to HRV measurements
2
DomainMeasurementUnitDescription
3
Time Domain [1-2]SDRRmsStandard deviation of RR intervals.
4
RMSSDmsRoot mean square of successive RR interval differences.
5
pnn 50%Percentage of successive RR intervals that differ by more than 50 ms.
6
Frequency Domain [1-2]VLFms2Power in the very low-frequency range (0.0033 – 0.04 Hz).
7
LFms2Power in the low-frequency range (0.04 – 0.15 Hz).
8
HFms2Power in the low-frequency range (0.15 – 0.4 Hz).
9
LF/HFms2Ratio of LF-to-HF power.
10
Nonlinear Domain [3-4]DFA a1Detrended fluctuation analysis, describes short-term fluctuations [3].
11
DFA a2Detrended fluctuation analysis, describes long-term fluctuations [3].
12
MSEMultiscle entropy, measures irregularity under different time scales [4].
13
14
HRV Usage [1]
15
(a) long-term HRV analysis (18~24 hrs).
16
HRV MethodUsage
17
Time-DomainApply to the entire recording period in one day
18
Frequency-DomainApply to each 5-mins segment, and then take average over the entire recording period.
19
Nonlinear-DomainApply to each 30-mins segment, and then take average over the entire recording period.
20
21
(b) Short-term HRV analysis (³ 5 mins for time- and frequency- domain analyses; ³ 30 mins for nonlinear-domain analysis).
22
HRV MethodUsage
23
Time-Domain &Apply to each 5-mins segment, and then take average over the entire recording period.
24
Frequency-Domain
25
Nonlinear-DomainApply to each 30-mins segment, and then take average over the entire recording period.
26
27
References
28
[1] M. Malik, J. T. Bigger, A. J. Camm, R. E. Kleiger, A. Malliani, A. J. Moss, and P. J. Schwartz, “Heart rate variability standards of measurement, physiological interpretation, and clinical use,” Eur. Heart J., vol. 17, no. 3, pp. 354–381, 1996.
29
[2] F. Shaffer and J. P. Ginsberg, “An Overview of Heart Rate Variability Metrics and Norms,” Front. Public Heal., vol. 5, Sep.2017, doi: 10.3389/fpubh.2017.00258.
30
[3] C.-K. Peng, S. Havlin, H. E. Stanley, and A. L. Goldberger, “Quantification of scaling exponents and crossover phenomena in nonstationary heartbeat time series,” Chaos, vol. 5, no. 1, pp. 82–87, 1995, doi: 10.1063/1.166141.
31
[4] M. Costa, A. L. Goldberger, and C.-K. Peng, “Multiscale Entropy Analysis of Complex Physiologic Time Series,” Phys. Rev. Lett., vol. 89, no. 6, 2002, doi: 10.1103/PhysRevLett.89.068102.
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100