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Table 4 Heart rate variability in the time and frequency domain at baseline and during recovery from exercise protocol

From: Cardiac autonomic dysfunction in chronic stroke women is attenuated after submaximal exercise test, as evaluated by linear and nonlinear analysis

 

Baseline

Recovery

Parameters

C

S

C

S

Time Domain

    

 VarRR (ms2)

1152 ± 39

717 ± 44*

1346 ± 130

890 ± 66*†

 SDNN (ms)

40 ± 8

30 ± 5*

41 ± 6

44 ± 8†

 rMSSD (ms)

34 ± 3

14 ± 2*

42 ± 4

35 ± 3†

 pNN50 (%)

8.7 ± 1.0

2.2 ± 0.5*

17.3 ± 4.2†

7.5 ± 1.6*†

Frequency Domain

    

 LF (ms2)

266 ± 80

216 ± 35

317 ± 81

244 ± 33†

 LF (%)

23 ± 6

12 ± 4

21 ± 5

25 ± 8†

 HF (ms2)

384 ± 75

55 ± 13*

533 ± 80

154 ± 30*†

 HF (%)

33.1 ± 9

8.4 ± 2*

38.2 ± 6

16.3 ± 3*†

Symbolic analysis

    

 0V (%)

21 ± 3

39.9 ± 2

24 ± 3

30.0 ± 3†

 1V (%)

49 ± 1

42.5 ± 1

48 ± 2

45 ± 2

 2V (%)

30 ± 3

17.3 ± 1

28 ± 4

25 ± 3†

  1. Values expressed as mean ± SD. C control group, S stroke group, VarRR variance of RR interval, SDNN standard deviation of the RR interval, rMSSD root-mean square of differences of successive RR intervals, pNN50% of differences of adjacent RR intervals > 50 ms, LF low frequency band in absolute and normalized values, HF high frequency band in absolute and normalized values, LF/HF low frequency/high frequency ratio; patterns with no variation (0 V; i. e., all 3 symbols were equal), (2) patterns with 1 variation (1 V; i. e., 2 symbols were equal and the remaining symbol was different), and patterns with 2 variations (2 V; i. e., all symbols were different from the previous ones) *P < 0.05 vs. C; †P < 0.05 vs. baseline in the same group; ‡P < 0.05 vs. post-exercise in the same group
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BMC Cardiovascular Disorders

ISSN: 1471-2261

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