Table 2.
Haemodynamic variables and intra-abdominal pressure at different study times
| Baseline | During passive leg raising | P vs. baseline | After volume expansion | P vs. baseline | |
|---|---|---|---|---|---|
| Heart rate, beats/mm | |||||
| Fluid responders | 92 ± 16 | 94 ± 17 | 0.07 | 94 ± 15 | 0.23 |
| Fluid nonresponders | 80 ± 21 | 79 ± 21 | 0.29 | 79 ± 19 | 0.07 |
| Mean arterial pressure, mm Hg | |||||
| Fluid responders | 67 ± 9 | 74 ± 10 | 0.07 | 76 ± 13 | 0.04 |
| Fluid nonresponders | 79 ± 13 | 81 ± 20 | 0.67 | 83 ± 14 | 0.13 |
| Mean systemic pressure, mm Hg | |||||
| Fluid responders | 25 ± 13 | 31 ± 13 | <0.01 | 32 ± 17 | <0.01 |
| Fluid nonresponders | 24 ± 10 | 27 ± 10 | <0.01 | 28 ± 12 | <0.01 |
| Cardiac index, L/mm/m2 | |||||
| Fluid responders | 2.8 ± 0.9 | 3.2 ± 0.8 | <0.01 | 3.6 ± 1.1 | <0.01 |
| Fluid nonresponders | 2.9 ± 1.1 | 3.0 ± 1.1 | 0.07 | 3.0 ± 1.3 | 0.07 |
| Central venous pressure, mm Hg | |||||
| Fluid responders | 7 ± 3 | 9 ± 4 | <0.01 | 9 ± 4 | <0.01 |
| Fluid nonresponders | 8 ± 4 | 11 ± 4 | <0.01 | 11 ± 4 | <0.01 |
| Inverse of the slope of venous return curve, mmHg.min.m2/L | |||||
| Fluid responders | 6.4 ± 3.7 | 6.8 ± 3.1 | 0.54 | 7.0 ± 5.4 | 0.35 |
| Fluid nonresponders | 5.9 ± 3.8 | 5.7 ± 3.7 | 0.75 | 6.0 ± 3.9 | 0.84 |
| Resistance to venous return, mmHg.min.m2/L | |||||
| Fluid responders | 6.6 ± 3.5 | 6.8 ± 4.5 | 0.66 | 6.6 ± 4.9 | 0.93 |
| Fluid nonresponders | 5.6 ± 3.5 | 5.7 ± 3.3 | 0.65 | 6.1 ± 4 | 0.22 |
| Mean systemic pressure - central venous pressure gradient, mmHg | |||||
| Fluid responders | 19 ± 12 | 22 ± 12 | 0,02 | 23 ± 15 | 0,02 |
| Fluid nonresponders | 16 ± 9 | 16 ± 9 | 0.62 | 17 ± 11 | 0.33 |
| Intra-abdominal pressure, mm Hg | |||||
| Fluid responders | 12 ± 6 | 12 ± 6 | 1,00 | 13 ± 6 | 0.42 |
| Fluid nonresponders | 16 ± 5 | 14 ± 5 | 0.09 | 16 ± 6 | 0.55 |
Values are expressed as mean ± standard deviation