Calculate PA pressure using pulmonary artery Doppler acceleration time.
Doppler interrogation of the pulmonary artery was performed in the parasternal short axis view, with the pulsed-wave sample volume placed at the annulus of the pulmonary valve. The acceleration time was defined as the interval between the onset of systolic pulmonary arterial flow and peak flow velocity.
J Am Soc Echocardiogr. 2011 Jun;24(6):687-92.