Table 1.
Hemodynamic and ventilatory subject parameters at three body positions
| Supine Rest | 30° HUT Rest | 70° HUT Rest | |
|---|---|---|---|
| HR, beats/min | 62 ± 12 | 67 ± 12[Link] | 80 ± 11[Link] , [Link] |
| MAP, mmHg | 77 ± 7 | 77 ± 8 | 87 ± 10[Link] , [Link] |
| MAPbrain, mmHg | 77 ± 7 | 62 ± 8 [Link] | 60 ± 10[Link] |
| mCBFv, cm/sec | 61 ± 15 | 56 ± 16[Link] | 52. ± 14[Link] , [Link] |
| PETCO2, mmHg | 38 ± 3 | 36 ± 3[Link] | 34 ± 4[Link] , [Link] |
| CO, L/min | 4.3 ± 1 | 3.6 ± 0.7[Link] | 3.5 ± 0.8[Link] |
| SVR, L/min per mmHg | 1.14 ± 0.22 | 1.35 ± 0.25[Link] | 1.57 ± 0.39[Link] , [Link] |
Averaged values (n = 22) of the parameters over the resting periods of 3.5 min used for the calculation of the transfer functions between spontaneous oscillations of MAPbrain and mCBFv by FFT(1 indicates significant difference between HUT30° and Supine, 2 indicates significant difference between HUT30° and HUT70°, and 3indicates significant difference between HUT0° and HUT70°,). HR, Heart rate; MAP, mean arterial pressure; MAPbrain, MAP at the brain level; mCBFv, mean cerebral blood flow; PETCO2, end‐tidal pCO2; CO, cardiac output (by pulse contour from the Finometer device), SVR, systemic vascular resistance (Finometer). Values are mean ± SD.