Background Pulmonary artery acceleration time (PAAT) is a noninvasive method to assess
pulmonary hemodynamics, but it lacks validity in children. The aim of this study was to …

Background—Pulsed-wave Doppler determination of the pulmonary artery acceleration time
(PAAT) as a surrogate for pulmonary artery pressure was found to be of clinical value for …

Background Assessment of pulmonary hemodynamics is critical in the diagnosis and
management of cardiopulmonary disease of premature infants, but reliable noninvasive …

Background Measuring mean pulmonary artery pressure by right-heart catheterization is the
gold standard for pulmonary hypertension (PH) diagnosis. However, its invasiveness and …

Background Transthoracic echocardiographic estimates of peak systolic pulmonary artery
pressure are conventionally calculated from the maximal velocity of the tricuspid …

BACKGROUND: We have shown previously that input impedance of the pulmonary
vasculature provides a comprehensive characterization of right ventricular afterload by …

BACKGROUND: Current noninvasive methods for estimating diastolic and mean pulmonary
artery pressures (PAp) in children are cumbersome and have limited accuracy. We …

Background In patients with pulmonary hypertension (PH), ascertaining raised vascular
resistance as a cause is a clinical objective, for which various Doppler-based measurements …

BACKGROUND: Pulmonary vascular resistance (PVR) is the current standard for evaluating
reactivity in children with pulmonary arterial hypertension (PAH). However, PVR measures …

BACKGROUND: The myocardial performance index (MPI) correlates with clinical status in
adults with idiopathic pulmonary arterial (PA) hypertension (IPAH). This pediatric study used …