Table 3

Linear regression analysis for haemodynamic and pulmonary function variables versus peak exerciseV˙o ₂ in patients with chronic heart failure

	R Value	p Value
Left ventricular ejection fraction	0.17	NS
Cardiac index	0.21	< 0.05
Mean arterial pressure	0.15	NS
Right atrial pressure	0.05	NS
Systolic pulmonary artery pressure	0.11	NS
Mean pulmonary artery pressure	0.09	NS
Pulmonary artery wedge pressure	0.09	NS
Transpulmonary pressure gradient	0.05	NS
Pulmonary vascular resistance	0.15	NS
Systemic vascular resistance	0.19	NS

Forced vital capacity	0.42	< 0.001
Forced expiratory volume in 1 s	0.35	< 0.001
Alveolar–capillary diffusing capacity	0.42	< 0.001
Mouth inspiratory pressure	0.32	< 0.05
Mouth expiratory pressure	0.47	< 0.001