Table 1

Definitions of pulmonary hypertension (PHT) and calculations for mean pulmonary artery pressure (PAP)

PHT definitionsMean PAP
Calculation of mean PAP: (1) mPAP = dPAP + (sPAP − dPAP)/3; (2) mPAP = (2 × dPAP + sPAP)/3 (these are the same equation expressed in two commonly used forms); d = diastolic, s = systolic.
Rest>25 mm Hg
Exercise>30 mm Hg
Mild<30 mm Hg
Moderate30–45 mm Hg
Severe>45 mm Hg