NPPB and bronchopulmonary dysplasia: This study aims to evaluate the temporal evolution of VLBWI myocardial function related to gestational age (GA) and postmenstrual age (PMA) and to explore the potential role of right ventricle (RV) TDI-derived measurements, tricuspid annular plane systolic excursion (TAPSE) and NTproBNP together to detect early signs of myocardial dysmaturation in infants who develop BPD.