Systemic haemodynamics during breathing mixtures of oxygen and nitrogen. Data are mean (SEM)
| Systolic blood pressure (mm Hg) | Diastolic blood pressure (mm Hg) | Pulse rate (1/min) | |
|---|---|---|---|
| Baseline | 127.3 (12.1) | 78.5 (6.0) | 78.8 (11.0) |
| 100% O2 + 0% N2 | 122.3 (13.2) | 76.5 (9.0) | 73.4 (10.6) |
| 80% O2 + 20% N2 | 124.4 (14.1) | 77.8 (9.4) | 72.3 (8.3) |
| 60% O2 + 40% N2 | 123.9 (11.3) | 78.0 (8.8) | 73.4 (10.2) |
| 40% O2 + 60% N2 | 126.6 (12.1) | 78.4 (9.5) | 74.3 (8.9) |
| 30% O2 + 70% N2 | 126.3 (11.6) | 78.2 (9.6) | 74.2 (9.1) |
| 20% O2 + 80% N2 | 125.8 (13.4) | 77.8 (9.2) | 76.3 (8.1) |
| 15% O2 + 85% N2 | 122.1 (10.0) | 75.3 (7.2) | 78.3 (7.2) |
| 10% O2 + 90% N2 | 127.4 (11.4) | 78.3 (8.5) | 86.9 (7.4) |