| |
Averaged frequency |
Energy density |
| |
IMF5 |
IMF6 |
IMF7 |
IMF5 |
IMF6 |
IMF7 |
| Baseline |
0.40 ± 0.10 |
0.11 ± 0.02 |
0.05 ± 0.01 |
33.00 ± 34.13 |
48.14 ± 64.6 |
124.84 ± 103.97 |
| HUT |
0.37 ± 0.07 |
0.11 ± 0.03 |
0.05 ± 0.01 |
17.04 ± 11.20 |
76.51 ± 100.41 |
116.04 ± 94.23 |
| 6-cycle |
0.49 ± 0.19 |
0.11 ± 0.01 |
0.08 ± 0.02 |
32.10 ± 51.48 |
278.50 ± 292.66 § |
53.51 ± 34.08* |
| 30-cycle |
0.41 ± 0.06 |
0.14 ± 0.04 § |
0.06 ± 0.01 § |
96.63 ± 94.59* |
12.22 ± 10.01* |
35.04 ± 43.24 § |
|
| *p<0.05 compared with baseline; § means p<0.01 compared with baseline. The present form is (mean ± standard deviation). VLF denotes very low frequency band (0.01-0.04Hz); LF denotes low frequency band (0.04-0.15Hz); HF denotes high frequency band (0.15-0.4Hz); IMF denotes intrinsic mode function; HUT denotes head-up tilt; 6-cycle denotes paced respiration with 6 cycles per minute; 30-cycle denotes paced respiration with 30 cycles per minute. |
| Table 2: Spectral analysis of adaptive short-term blood pressure variability (BPV) based on EMD. |
