Pulmonary artery acceleration time in young children is determined by heart rate and transpulmonary gradient but not by pulmonary blood flow: A simultaneous echocardiography-cardiac catheterization study.

Introduction: Pulmonary artery acceleration time (PAAT) is considered useful for the non-invasive evaluation of pulmonary artery pressure (PAP) and pulmonary vascular resistance (PVR). PAAT is dependent on PAP, PVR, pulmonary artery compliance, stroke volume, and heart rate. Its relative dependency on these determinants may differ between young and older children, raising uncertainty regarding its utility in young children.

Impact of Perioperative Brain Injury and Development on Feeding Modality in Infants With Single Ventricle Heart Disease.

Background Tube-assisted feeding in infancy is common in patients with single-ventricle physiology ( SVP ). Postnatal brain development is delayed, and injury is common, in patients with SVP . The role of brain findings in feeding outcomes remains unclear.