Table 3.
Mean values of hemodynamic parameters in the four quadrants of peak PETCO2–VE/VCO2 slope scatterplot
| Quadrant | N pts (%) | mPAP (mmHg) | RAP (mmHg) | CI (L/min/m2) | PVR (WU) |
|---|---|---|---|---|---|
| I Peak PETCO2 > median–VE/VCO2 slope < median | 63 (48%) | 41 ± 15* | 7 ± 3 | 2.7 ± 0.7 | 7.9 ± 5.2* |
| II Peak PETCO2 and VE/VCO2 slope > median | 14 (10%) | 47 ± 18 | 8 ± 5 | 2.5 ± 0.4 | 8.4 ± 5.8 |
| III Peak PETCO2 < median–VE/VCO2 slope > median | 58 (41%) | 49 ± 14* | 8 ± 4 | 2.4 ± 0.7 | 10.7 ± 5.7* |
| IV Peak PETCO2 and VE/VCO2 slope < median | 9 (6%) | 47 ± 16 | 7 ± 5 | 2.4 ± 0.7 | 8.7 ± 4.0 |
Note: Data are expressed as mean ± SD.
Abbreviations: ANOVA, analysis of variance; CI, cardiac index; mPAP, mean pulmonary arterial pressure; PETCO2, end‐tidal carbon dioxide pressure; PVR, pulmonary vascular resistance; RAP, right atrial pressure; VE/VCO2 slope, ventilation to carbon dioxide production slope.
*
p for ANOVA < 0.05 III versus I quadrant.