NPPB and hydrops fetalis: At 1-year follow-up, both HFrEF and HFmrEF patients overall had higher LVEF and lower MEE, E/e′, LVIDs, LVIDd, PWTs, IVSd, LAD, NT-proBNP, and cTNI than at baseline, which illustrated that for patients with AMI complicated by HF, cardiac function and MEE can be improved through timely revascularization of the occluded vessel to restore myocardial blood perfusion, long-term standard treatment, and relevant cardiac implantable electronic devices.