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Table 3 Heart rate variability analyses in frequency domain (power spectral analyses) and three dimensional return map data of type 2 diabetic patients according to peripheral arterial disease

From: Cardiovascular autonomic neuropathy in type 2 diabetes mellitus patients with peripheral artery disease

 

With PAD

Without PAD

P*

 

n = 24

N = 43

 

Power spectral analyses #

Very low frequency ms2/Hz

328 ± 295

755 ± 924

0.032

Low Frequency ms2/Hz

123 ± 152

490 ± 815

0.01

High Frequency ms2/Hz

61 ± 85

137 ± 162

0.005

Total Power ms2/Hz

538 ± 513

1406 ± 1880

0.031

Low frequency (LF) n.u.

0.55 ± 0.13

0.75 ± 0.42

0.56

High frequency (HF) n.u.

0.31 ± 0.06

0.25 ± 0.14

0.46

Low frequency/ High frequency

1.98 ± 0.9

3.37 ± 1.82

0.067

Three dimensional return map

P1 24-h

59.5 ± 9.5

61.6 ± 8.7

0.38

P1 day

58.0 ± 9.5

61.0 ± 7.7

0.17

P1 night

61.7 ± 9.4

66.8 ± 9.7

0.04

P2 24-h

54.5 ± 15.2

62.7± 2.9

0.02

P2 day

46.5 ± 13.6

54.9 ± 12.7

0.01

P2 night

44.5 ± 14.5

51.9 ± 12.7

0.03

P3 24-h

75.0 ± 37.1

80.3 ± 30.8

0.52

P3 day

65.4 ± 33.7

72.5 ± 30.3

0.37

P3 night

61.4 ± 24

65.6 ± 23

0.47

MN 24-h

272 ± 227

326 ± 195

0.31

MN Day

195 ± 156

259 ± 182

0.15

MN night

186 ± 136

247 ± 135

0.08

  1. Data expressed as mean ± SD; P1 = index reflecting sympathetic modulation; P1, P2, and P3 are expressed as arbitrary units; P2 and P3 = indices reflecting vagal modulation; MN = global modulation; * Student t-test; # Data were log transformed before analyses.