Summary
Pulmonary arterial pressure flow relationships were determined in middle-aged male healthy subjects selected amidst patients intending to an invalidity pension for anthracosilicosis.
At rest in the sitting position the mean pulmonary artery pressure was 10.8 ± 4.3 mm Hg for a cardiac output of 5.0 ± 0.9 l/min. The average relationship between increase of pulmonary artery pressure and increase of cardiac output during bicycle exercise was approximately linear. With a cardiac output of 13.3 ±1.7 l/min the mean pulmonary artery pressure reached 22.5 ± 4.6 mm Hg.
The total pulmonary resistance (left atrial pressure assumed to be 0) decreased during exercise; the extent of this decrease showed considerable variation from one subject to another.
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Degré, S., de Coster, A., Messin, R. et al. Normal pulmonary pressure-flow relationship during exercise in the sitting position. Int. Z. Angew. Physiol. Einschl. Arbeitsphysiol. 31, 53–59 (1972). https://doi.org/10.1007/BF00700994
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DOI: https://doi.org/10.1007/BF00700994