Figure 9.

Pulmonary vascular resistance vs.${\dot{\mathbf{V}}}_{\mathbf{e}}$/$\dot{\mathbf{V}}{\mathbf{O}}_{\mathbf{2}}$. All patients in this study had an AT of 10 ml.min⁻¹.kg⁻¹ or less. The graph shows the large variation in pulmonary vascular resistance with a ${\dot{V}}_e$ / $\dot{V}{\mathrm{O}}_2$ of greater than 35. To be certain that the pulmonary vascular resistance will exceed 35 kPa.L^-1.s, the V_e / $\dot{V}{\mathrm{O}}_2$ needs to be greater than 45. Note the PVRI of those patients with a ${\dot{V}}_e$ / $\dot{V}{\mathrm{O}}_2$ of 35. Data from the author’s laboratory.