Most readmissions were attributed to HF-related ornon-cardiovascular causes, with three-fifths occurring 14 days after discharge.SBP ≤130 mmHg, higher level of NYHA classification, NT-proBNP, hs-cTNT,diabetes mellitus, anemia, and worse health status in index hospitalization wereassociated factors with increased risks of 30-day readmission. The gene discussed is NPPB; the disease is hydrops fetalis.