Table 2 Mean values and standard deviation (SD) of HRV in individuals with TMD in the supine position.

From: Reliability of short-term measurement of heart rate variability on rest in individuals with temporomandibular disorder

HRV indices

Examiner 1

Examiner 1

Examiner 2

Examiner 2

Test

Retest

Test

Restest

Overview

 PNS Index

− 1.14 ± 0.73

− 1.16 ± 0.68

− 1.14 ± 0.71

− 1.16 ± 0.69

 SNS Index

1.78 ± 1.06

1.73 ± 1.03

1.72 ± 1.00

1.74 ± 0.99

 Stress Index

15.05 ± 4.90

14.64 ± 4.63

14.66 ± 4.50

14.71 ± 4.38

Time domain

 Mean RR (ms)

764.07 ± 87.60

761.60 ± 82.52

764.30 ± 85.95

763.11 ± 84.47

 SDNN (ms)

31.77 ± 12.74

32.39 ± 12.71

32.05 ± 12.27

31.88 ± 12.14

 Mean HR (bpm)

79.48 ± 8.68

79.66 ± 8.47

79.44 ± 8.66

79.53 ± 8.58

 RMSSD (ms)

26.84 ± 14.14

26.91 ± 14.02

26.91 ± 13.82

26.48 ± 13.57

 pNN50%

8.21 ± 11.91

6.42 ± 7.68

6.51 ± 8.02

7.87 ± 11.56

 RR Tri

8.13 ± 3.09

8.40 ± 3.45

8.39 ± 3.24

8.24 ± 3.03

 TINN

156.76 ± 72.60

162.30 ± 64.74

164.43 ± 69.19

159.91 ± 63.26

Frequency domain

 VLF (ms2)

83.95 ± 72.60

81.15 ± 63.43

81.95 ± 67.16

82.82 ± 75.33

 LF (ms2)

636.82 ± 538.66

629.44 ± 488.21

629.18 ± 477.31

582.72 ± 468.06

 HF (ms2)

390.91 ± 496.16

386.44 ± 563.67

388.48 ± 475.62

387.62 ± 479.04

 VLF (log)

4.04 ± 0.93

4.07 ± 0.83

4.11 ± 0.77

4.06 ± 0.86

 LF (log)

6.06 ± 0.94

6.11 ± 0.86

6.15 ± 0.78

6.07 ± 0.78

 HF (log)

5.35 ± 1.17

5.32 ± 1.15

5.37 ± 1.15

5.35 ± 1.16

 LF (n.u.)

64.98 ± 18.49

66.25 ± 18.83

66.40 ± 17.78

64.67 ± 18.47

 HF (n.u.)

34.97 ± 18.49

33.69 ± 18.82

33.57 ± 17.77

35.27 ± 18.44

 Total power

1112.04 ± 940.20

1097.60 ± 940.85

1099.90 ± 882.43

1053.53 ± 895.37

 LF/HF

2.96 ± 2.72

3.20 ± 2.94

3.10 ± 2.77

2.99 ± 2.89

Nolinear methods

 SD1 (ms)

19.01 ± 10.01

18.99 ± 9.70

19.12 ± 10.04

18.75 ± 9.61

 SD2 (ms)

40.40 ± 15.80

41.41 ± 15.88

40.82 ± 14.93

40.72 ± 15.01

 SD2/SD1

2.31 ± 0.74

2.36 ± 0.71

2.34 ± 0.70

2.37 ± 0.75

 Apen

1.17 ± 0.09

1.18 ± 0.09

1.18 ± 0.09

1.18 ± 0.09

 SampEn

1.67 ± 0.28

1.66 ± 0.27

1.67 ± 0.26

1.66 ± 0.25

 DFA α1

1.17 ± 0.26

1.20 ± 0.27

1.18 ± 0.25

1.18 ± 0.26

 DFA α2

0.47 ± 0.15

0.48 ± 0.14

0.48 ± 0.14

0.49 ± 0.16

  1. HRV heart rate variability, SD standard desviation, RR interbeat intervals between all successive heartbeats, PNS parasympathetic nervous system, SNS sympathetic nervous system, ms milliseconds, SDNN standard deviation of the N–N interval, bpm beats per minute, RMSSD root mean square differences of successive RR intervals, RR Tri integral of the RR intervals histogram divided by the height of the histogram, TINN baseline width of the RR intervals histogram, VLF very-low frequency, LF low-frequency band, HF the high-frequency band, ms2: milliseconds squared, n.u normalized units, log logarithmic, LF/HF ratio of LF-to-HF, SD1 Poincaré plot standard deviation perpendicular the line of identity, SD2 Poincaré plot standard-deviation along the line of identity, SD2/SD1 ratio of SD1-to-SD2, ApEn approximate entropy, SampEn sample entropy, DFA α1 detrended fluctuations analysis. Which describes short-term fluctuations, DFA α2 detrended fluctuation analysis. Which describes long-term fluctuations.
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