Table 2.
Mean and standard deviation for time-domain indices between before, 0–5 minutes, 5–10 minutes and 10–15 minutes after the postural change maneuver in the control protocol
| Index | Seated rest | 0-5 min | 5-10 min | 10-15 min | p |
|---|---|---|---|---|---|
| SDNN (ms) |
45.1±9 |
44.6±13 |
44.6±13 |
*34.7±8 |
0.040 |
| RMSSD (ms) |
30.4±12 |
19.2±7 |
17.7±7 |
*16.9±7 |
0.030 |
| pNN50 (%) | 11.4±14 | 3.2±4 | 2.7±3 | *2±3 | 0.0189 |
*Different from Control. N=12.
Legend: SDNN standard deviation of normal-to-normal R-R intervals, pNN50 the percentage of adjacent RR intervals with a difference of duration greater than 50 ms, RMSSD root-mean square of differences between adjacent normal RR intervals in a time interval. ms millisecond.