NPPB and hydrops fetalis: The main outcome was HF, as well as the secondary outcomes contained all-cause mortality, ECG, LV diastolic function (LVDF), cardiac death, longitudinal systolic strain, and velocities measured by tissue Doppler imaging, cardiac biomarkers, such as CK-MB, brain natriuretic peptide (BNP), and troponin I (TnI) (Murtagh et al., 2016).