In a limited group of pulmonary hypertension (PHT) patients (n = 48), FGF23 levels exhibited correlations with mean pulmonary artery pressure (mPAP), cardiac index (CI), pulmonary vascular resistance (PVR), NT-proBNP and the REVEAL risk score [34]. This evidence concerns the gene FGF23 and pulmonary hypertension, primary, 1.