Clinical Characteristics (n = 100).

<p>*Mean ± SD.</p>†<p>Multiple symptoms may be present.</p

Top Panel: R₅₋₂₀ at baseline and during voluntary inflation.

<p>Data are mean ± SE. Dotted line represents the upper limit of normal. Bottom Panel: Individual values obtained during voluntary inflation are plotted as a function of the absolute EELV at which it was obtained. EELV is expressed as % predicted FRC. Data are shown for 50/71 patients in whom maneuvers were acceptable for analysis. Dotted line represents the upper limit of normal. (• = baseline ○ = voluntary inflation).</p

Top Panel: R₂₀ at baseline and during voluntary inflation.

<p>Data are mean ± SE. Dotted line represents the upper limit of normal. Bottom Panel: Individual values for specific conductance at 20 Hz (SG_rs @ 20 Hz) plotted as a function of the absolute EELV at which it was obtained. EELV is expressed as % predicted FRC. Dotted and solid lines represent the mean ±1.65 SD calculated from data obtained in normal subjects. (• = baseline ○ = voluntary inflation).</p

Individual values for R₂₀, R₅₋₂₀, and X₅ are related to ERV.

<p>Dotted line represents the upper limit of normal for each parameter.</p

Effect of bronchodilator administration on R₅₋₂₀ at baseline and during voluntary inflation to predicted FRC.

<p>Data are mean ± SE. Dotted line represents the upper limit of normal. (• = baseline ○ = voluntary inflation).</p

Subject characteristics.

<p>Subject characteristics.</p

Cardiac Output, Stroke volume and Cardiac Index and Cardiac Output normalized for increasing body size based on allometric consideration (CO/kg^0.75) for individual subjects (n = 24) are plotted against D_M/V_C in 4 panels.

<p>Cardiac Output, Stroke volume and Cardiac Index and Cardiac Output normalized for increasing body size based on allometric consideration (CO/kg^0.75) for individual subjects (n = 24) are plotted against D_M/V_C in 4 panels.</p

Lung function.

<p>Lung function.</p

Individual values for resistance (R₅) and respiratory system elastance (X₅) obtained at baseline FRC are related to V_C.

<p>The dashed lines indicate the limits of normal for each parameter.</p

Pulmonary artery distensibility is plotted against V_C for individual subjects (n = 24).

<p>Data are presented per unit alveolar volume.</p