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Equation of Chemla et al for Estimating Mean Pulmonary Artery Pressure (MPAP) from Systolic Pulmonary Artery Pressure (SPAP)

Description

Chemla et al developed a formula for estimating the mean pulmonary artery pressure (MPAP) from the systolic pulmonary artery pressure (SPAP). The authors are from Publique-Hopitaux de Paris, Hopital Antoine Beclere and Hopital Marie Lannelongue in France.


 

The authors found that both systolic and mean pulmonary artery pressures were closely related.

 

Parameters:

(1) systolic pulmonary artery pressure in mm Hg

 

estimated mean pulmonary artery pressure in mm Hg =

= (0.61 * (systolic pulmonary artery pressure)) + 2

 

If pulmonary hypertension is defined as a MPAP > 25 mm Hg, then an SPAP > 38 mm Hg can serve as a surrogate marker.

 


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