Levy PT, et al. - Researchers examined the proposition that echocardiographic markers of pulmonary vascular disease (PVD) existed in asymptomatic infants born preterm at 1-year corrected age. The enrollment consisted of infants born preterm (<29 weeks of gestation) and age- and weight-matched infants born at term. Regardless of the neonatal lung disease status, infants born preterm demonstrated abnormal pulmonary artery acceleration time (PAAT) at 1-year corrected age compared to infants born at term. This data illustrated the existence of PVD beyond infancy. It was inferred that the PAAT measurements presented as a reliable, noninvasive tool for screening and longitudinal monitoring of pulmonary hemodynamics in infants.