TABLE 1

Exercise-related indices considered as predictors of prognosis in patients with cardiac and chronic respiratory disorders

	PVD	CHF	ILD	CF	COPD
V′_O₂_peak	+	+	+	+	+
Inspiratory capacity	+				++
V′_E/V′_CO₂	++	++	++		++
P_aO₂-slope (ΔP_aO₂/ΔV′_O₂)			+		+
Arterial desaturation	+		++	+	+

PVD: pulmonary vascular disease; CHF: chronic heart failure; ILD: interstitial lung disease; CF: cystic fibrosis; V′_O₂_peak: oxygen uptake at peak exercise; V′_E/V′_CO₂: ventilatory equivalent for carbon dioxide; P_aO₂: arterial oxygen partial pressure; +: sensitive; ++: more sensitive.