Table 3. Change of ventilatory parameters (peak-rest).
| HVS (n = 29) | control (n = 29) | p | |
|---|---|---|---|
| VO2 (l/min) | 1.10 (0.98–1.38) | 1.65 (1.24–2.02) | <0.01 |
| VO2 (ml/kg/min) | 15.2 ± 6.0 | 20.4 ± 6.7 | <0.01 |
| VCO2 (l/min) | 1.1 (1.0–1.3) | 1.5 (1.3–1.8) | <0.01 |
| VE (l/min) | 44 ± 14 | 43 (39–51) | 0.70 |
| fb (bpm) | 22 ± 8 | 12.2 ± 7.1 | <0.01 |
| VT (l) | 0.88 ± 0.36 | 1.36 ± 0.54 | <0.01 |
| VD/VT | -0.03 ± 0.09 | -0.09 ± 0.11 | 0.04 |
| PETCO2 (mmHg) | 0.50 ± 5.26 | 6.2 ± 4.6 | <0.01 |
| VE/VCO2 ratio | 0.17 (-4.24–6.02) | -6.6 (-11.4-(-2.8)) | <0.01 |
| RER | 0.18 (0.04–0.31) | 0.2 (0.14–0.28) | 0.69 |
| HR (beat/min) | 45 ± 14 | 65 ± 15 | <0.01 |
Data shown as mean ± SD or median (IQR). bpm = breaths per minute; fb = breathing frequency; FiO2 = fraction of inspired oxygen; HR = hear rate; HVS = hyperventilation syndrome; kg = kilogram; l = liter; min = minute; ml = milliliter; mmHg = millimeters of mercury; PaCO2 = partial pressure of arterial carbon dioxide; VCO2 = carbon dioxide output; VD = dead space volume; VE = minute ventilation; VE/VCO2 = ventilatory efficiency; VO2 = oxygen consumption; VT = tidal volume