NPPB and hydrops fetalis: The study group was divided into subgroups comprising patients who developed LV dysfunction and HF symptoms during the six months following AMI (LVEF ≤ 50%, NT-proBNP ≥ 150 pg/ml; termed the HF group, n = 7) and those who did not (LVEF ≥ 60%, NT-proBNP ≤ 100 pg/ml; termed the non-HF group, n = 7).