Pulmonary function tests in patients with chronic heart failure
| All patients | Group 1 (V˙o2 peak ⩽ 14 ml/kg/min) | Group 2 (V˙o2 peak > 14 ml/kg/min) | p Value 2-150 | |
|---|---|---|---|---|
| Number | 161 | 109 | 52 | |
| Forced vital capacity (litres) | 3.3 (0.84) | 3.2 (0.8) | 3.5 (0.9) | < 0.05 |
| Forced vital capacity (%) | 87 (19) | 86 (18) | 94 (17) | < 0.05 |
| Forced expiratory volume in 1 s (litres) | 2.63 (0.8) | 2.6 (0.7) | 2.7 (0.8) | NS |
| Forced expiratory volume in 1 s (%) | 88 (22) | 87.3 (21) | 90.5 (19) | NS |
| Ratio of forced expiratory volume in 1 s to forced vital capacity | 82 (16) | 86 (19) | 78 (12) | NS |
| Carbon monoxide alveolar–capillary diffusing capacity (ml/mm Hg/min) | 18.9 (6.2) | 17.7 (5.5) | 21.6 (6.8) | < 0.05 |
| Carbon monoxide alveolar–capillary diffusing capacity (%) | 71 (20) | 67 (19) | 81 (24) | < 0.05 |
| Ratio of carbon monoxide alveolar–capillary diffusing capacity to alveolar volume | 3.58 (1.0) | 3.6 (0.8) | 3.7 (1.0) | NS |
| Mouth inspiratory pressure (cm H2O)2-151 | 65 (23) | 66 (24) | 64 (25) | NS |
| Mouth inspiratory pressure (%)2-151 | 60 (20) | 60 (20) | 59 (23) | NS |
| Mouth expiratory pressure (cm H2O)2-151 | 108 (39) | 103 (37) | 110 (37) | NS |
| Mouth expiratory pressure (%)2-151 | 72 (30) | 70 (30) | 71 (25) | NS |