Table 3.
Mean spectral analysis measurements of activation recovery interval (ARI), systolic blood pressure (SBP), and the maximum rate of systolic pressure increase (dP/dtmax) at rest and following the Valsalva.
| Control | Post valsalva | P-value | |
|---|---|---|---|
| HF-ARI, ms2 | 10.61 (±6.52) | 14.15 (±8.69) | 0.007 |
| nHF-ARI, nu | 0.53 (±0.16) | 0.51 (±0.2) | 0.765 |
| LF-ARI, ms2 | 2.65 (±1.7) | 7.37 (±5.1) | 0.002 |
| nLF-ARI, nu | 0.15 (±0.09) | 0.28 (±0.19) | 0.019 |
| HF-SBP, mmHg2 | 7.88 (±7.04) | 36.73 (±27.17) | 0.004 |
| nHF-SBP, nu | 0.46 (±0.19) | 0.17 (±0.12) | 0.004 |
| LF-SBP, mmHg2 | 9.45 (±9.15) | 244.11 (±175.83) | 0.004 |
| nLF-SBP, nu | 0.49 (±0.17) | 0.84 (±0.11) | 0.004 |
| HF-dP/dtmax, mmHg2/s2 | 2,794.07 (±3,354.78) | 4,403.17 (±2,730.79) | 0.129 |
| nHF-dP/dtmax, nu | 0.46 (±0.2) | 0.15 (±0.1) | 0.004 |
| LF-dP/dtmax, mmHg2/s2 | 2,174.1 (±2,626.31) | 31,417.85 (±19,097.79) | 0.004 |
| nLF-dP/dtmax, nu | 0.41 (±0.18) | 0.82 (±0.12) | 0.004 |
HF, high frequency; nHF, normalized HF; LF, low frequency; nLF, normalized LF. Values are shown as means (±SD).