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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