Dabestiani et al reported equations for estimating mean pulmonary artery pressure in a patient from pulsed Doppler echocardiography.

Analysis: pulsed Doppler echocardiography


Observations of Dabestiani:

(1) normal patients: PA flow velocity accelerates slowly to a peak flow velocity at midsystole

(2) pulmonary hypertension: PA flow velocity accelerates rapidly to peak flow velocity in early systole



(1) pulmonary acceleration time (PAT) in ms



mean Pulmonary Artery Pressure in mm Hg

< 120 ms

90 - (0.62 * (PAT))

>= 120 ms

79 - (0.45 * (PAT))



• The area under the ROC curve is 0.71 in the report of Hellenkamp et al, which is less than that seen with other methods (Aduen et al, Chemla et al).

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