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Table 3 Correlations between VE/VCO2 SLOPE (% pred) and Lowest VE/VCO2 (% pred) with some key parameters in SLE-PAH and IPAH patients

From: Characteristics of exercise capacity in female systemic lupus erythematosus associated pulmonary arterial hypertension patients

 

VE/VCO2 SLOPE % pred

Lowest VE/VCO2% pred

SLE-PAH

IPAH

SLE PAH

IPAH

NT-proBNP, pg/ml

0.67**

−0.09

0.46*

0.10

NYHA

0.15

0.01

0.22

0.07

Peak vo2/kg

−0.49*

−0.12

− 0.54*

−0.42

Peak vo2%pred

−0.49*

−0.30

− 0.56**

− 0.61**

RAP, mm Hg

0.42

− 0.11

0.44*

− 0.03

mPAP, mm Hg

0.50*

0.45*

0.42

0.64**

CO, L/min

−0.61**

0.24

−0.67**

0.06

CI, L/min/m2

−0.65**

0.24

−0.73**

0.02

PVR, Wood U

0.76**

0.34

0.69*

0.62**

OUEP%pred

−0.80**

−0.62**

− 0.88**

−0.75**

OUES%pred

−0.61**

−0.31

− 0.64**

0.02

  1. NYHA New York Heart Association heart failure classification, mPAP mean pulmonary artery pressure, PVR pulmonary vascular resistance, CI Cardiac index, DL CO diffusing capacity for carbon monoxide; Peak\( \overset{{}^{\circ}}{\mathsf{V}} \)O 2 peak oxygen uptake, P ET CO 2 partial pressure of end-tidal carbon dioxide, VE ventilation, VCO 2 carbon dioxide output
  2. *p<0.05, **<0.005