Figure 2.

Correlation of NT-proBNP with RHC parameters. In patients with PAH, NT-proBNP levels have a significant positive correlation with RHC parameters of (A) mPAP; (B) mRAP; and (C) PVR. NT-proBNP, N-terminal pro-brain natriuretic peptide; mPAP, mean pulmonary artery pressure (mm Hg); mRAP, mean right atrial pressure (mm Hg); PVR, pulmonary vascular resistance (Wood units); PAH, pulmonary arterial hypertension; Log, natural log; r, Pearson coefficient.