Ventilation and gas exchange during exercise in severe chronic heart failure.

@article{Rubin1984VentilationAG,
  title={Ventilation and gas exchange during exercise in severe chronic heart failure.},
  author={Stanley A Rubin and Herman Brown},
  journal={The American review of respiratory disease},
  year={1984},
  volume={129 2 Pt 2},
  pages={S63-4}
}
Dyspnea and exercise limitation are ubiquitous symptoms in heart failure; the role of pulmonary factors has not been defined. We studied patients with severe left ventricular dysfunction at upright rest and during cycle ergometry. Arterial oxygen tension and saturation were normal at rest and exercise despite mild abnormalities in Qs/Qt and P(A-a)O2, as well as the effects of low S-vO2. Ventilation was increased at rest and exercise because of increased VD/VT and alveolar hyperventilation. The… CONTINUE READING

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