Echocardiographic evaluation of systolic and mean pulmonary artery pressure in patients with pulmonary hypertension

We read with interest the recent article by Pyxaras et al .1 proposing corrected regression equations for improving the echocardiographic estimation of systolic pulmonary artery pressure (sPAP) and mean pulmonary artery pressure (mPAP) in patients with pulmonary hypertension (PH). The authors propose to slightly modify both the sPAP Bernouilli equation and the empirical mPAP equation (mPAP = 0.61 sPAP + 2 mmHg). Before accepting the authors' conclusion that their two corrected formulas may be more reliable than previous ones, we would like to make the …