Table 1. Baseline values of variance (time domain) and spectral parameters (frequency domain) calculated for the heart rate (HR) and systolic arterial pressure (SAP) time series using autoregressive spectral analysis. Values are expressed as means (±SEM).
|
SN (n=10) |
TN (n=10) |
SH (n=10) |
TH (n=10) |
| HR Variance, ms2 |
12.7 (1.6) |
18.6 (2.3) |
10.3 (1.5) |
21.7 (1.4) # |
| †ƒVLF, ms2 |
10.0 (1.8) |
7.6 (1.4) |
5.6 (1.3) |
8.4 (1.6) |
| †ƒLF, ms2 |
2.4 (.7) |
1.1 (.1) |
6.0 (.6) * |
.8 (.2) *# |
| †ƒLF, nu |
21.2 (3.5) |
14.7 (1.4) |
12.9 (2.4) |
14.3 (2.0) |
| †ƒHF, ms2 |
4.9 (.6) |
4.7 (.4) |
4.7 (2.0) |
6.2 (1.5) |
| †ƒHF, nu |
77.9 (3.4) |
85.0 (1.4) |
73.8 (2.3) |
84.3 (1.9) # |
| †ƒLF/HF |
.4 (.1) |
.2 (.0) |
3.6 (1.0) * |
.1 (.0) *# |
| SAP Variance, mmHg2 |
11.1 (1.3) |
9.7 (1.2) |
38.8 (6.9) * |
28.4 (3.4) * |
| †ƒLF, mmHg2 |
3.6 (.4) |
3.6 (.6) |
17.3 (2.4) * |
5.3 (.9) # |
| †ƒHF, mmHg2 |
4.6 (.2) |
5.4 (.6) |
3.9 (.2) |
4.9 (.4) # |
# p < 0.05 SH.* p < 0.05 SN andAbbreviations: VLF; very low-frequency component, LF; low-frequency component, HF; high-frequency component, nu indicates normalized units.
