TNNT2 and hydrops fetalis: The E/e', GAS, GLS, LAVI, LVMI, serum urea, sCr, hs-cTnT, NT-proBNP, and NT-proBNP/CysC1.53 ratio in the HF group were significantly higher than those in the control group, while the LVEF was significantly lower than that in the control group (p < 0.05).