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Table 2 Heart rate variation during periods with and without PLMS

From: Change in heart rate variability precedes the occurrence of periodic leg movements during sleep: an observational study

 

Periods with PLMS

Periods without PLMS

p

r

VLF power (ms)

23.1 ± 8.5

13.3 ± 4.3

< 0.01

0.88

LF power (ms)

16.4 ± 6.6

7.7 ± 2.8

< 0.01

0.88

HF power (ms)

10.2 ± 6.5

11.8 ± 8.8

n.s.

-

LF/HF

2.25

1.02

< 0.01

0.88

mean frequency in VLF (Hz)

0.030 ± 0.001

0.028 ± 0.001

n.s.

-

mean frequency in LF (Hz)

0.075 ± 0.004

0.075 ± 0.004

n.s.

-

mean frequency in HF (Hz)

0.220 ± 0.016

0.223 ± 0.020

n.s.

-

mean frequency in FHFB (Hz)

0.045 ± 0.090

0.038 ± 0.007

< 0.01

0.76

mean frequency of PLMS (Hz)

0.035 ± 0.012

-

-

-

  1. Values are expressed as mean±SD, except for LF/HF.
  2. PLMS, periodic leg movement during sleep; VLF, very low frequency; LF, low frequency: HF, high frequency; FHFB, fluctuation of a HF band; n.s., not significant.