Table 1.
Limits of normal of pulmonary blood flow and vascular pressures
| Variables | Mean | Limits of normal |
|---|---|---|
| Q L/min | 6.4 | 4.4 – 8.4 |
| Q, L/min.m2 | 3.8 | 2.5 – 4.5 |
| Heart rate, bpm | 67 | 4 – 100 |
| Ppa systolic, mmHg | 19 | 13 – 26 |
| Ppa diastolic, mmHg | 10 | 6 – 16 |
| Ppa, mean, mmHg | 13 | 7 – 19 |
| Ppao, mmHg | 9 | 5 – 13 |
| Pcp, mmHg | 10 | 8 – 12 |
| Pra, mmHg | 5 | 1 – 9 |
| PVR, dyne.s.cm−5 | 55 | 11 – 99 |
| Psa, mean, mmHg | 91 | 71 – 110 |
Legend: Q: cardiac output; Ppa: pulmonary artery pressure; Ppao: occluded Ppa; Pcp: pulmonary capillary pressure (measured by single occlusion); Pra: right atrial pressure: PVR: pulmonary vascular resistance; Psa: systemic arterial pressure; limits of normal: from mean − 2 SD to mean + 2 SD