Utility of Pulmonary Artery Acceleration Time to Estimate Systolic Pulmonary Artery Pressure in Neonates and Young Infants

摘要

A. Shows the Doppler cursor placed in the center of the pulmonary valve just proximal to the annulus with perfect alignment with the main pulmonary artery axis obtained from the parasternal short axis view. PAAT (the green line that depicted by the green arrow) is defined by the time between the onset of right ventricle ejection and peak flow velocity