A Multivariable Index for Grading Exercise Gas Exchange Severity in Patients with Pulmonary Arterial Hypertension and Heart Failure

Table 6

Relationship of individual gas exchange measures with CI and RVSP in HF and PAH, respectively.

	HF cardiac index	NYHA	PAH RVSP	WHO
Rest PetCO2	0.52	0.47	0.39	0.12
ΔPetCO2	0.42	0.23	0.62	0.55
SaO2	0.05	0.23	0.47	0.15
OUES	0.66	0.40	0.46	0.47
𝑉𝐸 /VCO2 slope	0.53	0.34	0.63	0.51
𝑃CAP	0.69	0.40	0.58	0.41
MVI score	0.74	0.49	0.73	0.53