NKRF and hydrops fetalis: In the current study, we first confirmed that AMI patients with HF and non-HF post-PCI had different patterns of lncRNA-NRF expression in the peripheral blood: circulating lncRNA-NRF levels in AMI patients with HF post-PCI were significantly elevated compared with non-HF after AMI controls, reached a peak in intraprocedural and gradually returned to base line levels at 3 days.