TABLE 1.
All recorded parameters sorted by recordings before (PRE) and at the end of head down tilt bed rest (HDT).
| Parameter | Pooled analysis (n = 24) |
p-value | ||
| PRE | Δ (HDT-PRE) | HDT | ||
| Aortic SBP (mmHg) | 108 ± 12 | 0 ± 11 | 108 ± 8 | 0.935 |
| Aortic DBP (mmHg) | 72 ± 7 | + 9 ± 7 | 81 ± 7 | <0.001 |
| SBP (mmHg) | 125 ± 11 | −1 ± 10 | 124 ± 9 | 0.652 |
| DBP (mmHg) | 70 ± 7 | + 8 ± 7 | 78 ± 7 | <0.001 |
| Pulse pressure (mmHg) | 55 ± 13 | −9 ± 9 | 46 ± 9 | <0.001 |
| Heart rate (bpm) | 62 ± 9 | + 7 ± 9 | 69 ± 11 | 0.002 |
| Stroke volume (ml) | 97 ± 20 | −14 ± 15 | 83 ± 15 | 0.001 |
| Cardiac output (l/min) | 5.9 ± 0.9 | −0.3 ± 0.8 | 5.6 ± 1.1 | 0.265 |
| PATArm (ms) | 154 ± 15 | + 9 ± 12 | 163 ± 17 | 0.002 |
| PATFinger (ms) | 205 ± 17 | −1 ± 20 | 204 ± 18 | 0.898 |
| PATThigh (ms) | 209 ± 19 | + 8 ± 15 | 217 ± 19 | 0.022 |
| PATToe (ms) | 353 ± 22 | −3 ± 27 | 350 ± 24 | 0.957 |
| ICT (ms) | 49 ± 8 | + 8 ± 13 | 57 ± 11 | 0.036 |
| cPATArm (ms) | 105 ± 14 | + 2 ± 15 | 107 ± 15 | 0.354 |
| cPATFinger (ms) | 156 ± 17 | −8 ± 19 | 148 ± 13 | 0.058 |
| cPATThigh (ms) | 160 ± 19 | 0 ± 16 | 160 ± 17 | 0.561 |
| cPATToe (ms) | 304 ± 18 | + 11 ± 24 | 293 ± 22 | 0.188 |
| bfPWV (m/s) | 9.0 ± 1.2 | + 0.2 ± 1.0 | 9.2 ± 1.3 | 0.864 |
| AOC (ml/mmHg) | 2.7 ± 0.6 | + 0.4 ± 0.8 | 3.1 ± 0.6 | 0.094 |
| AOD (10–3 mm Hg–1) | 4.8 ± 2.0 | −0.5 ± 2.4 | 4.3 ± 2.2 | 0.364 |
| AOAmin (mm2) | 481 ± 88 | + 24 ± 53 | 505 ± 102 | 0.050 |
Aortic SBP and aortic DBP, aortic systolic and diastolic blood pressure; SBP and DBP, brachial systolic and diastolic blood pressure; PAT, pulse wave arrival time; ICT, isovolumetric contraction time; cPAT, PAT corrected for ICT; bfPWV, brachial-femoral pulse wave velocity; AOC, aortic compliance; AOD, aortic distensibility; AOAmin, minimum aortic area. Results are represented as mean values ± standard deviation from 24 subjects and statistical significance (p < 0.05) is indicated by p-values in bold.