DNM1L and hydrops fetalis: Serum Drp1 concentrationswere much higher in HFpEF than that in HFrEF (4.2 ± 3.7 ng/mL vs. 2.6± 2.2 ng/mL, p = 0.001) and the ROC analysis demonstrated it as apotential diagnostic biomarker for distinction of the HF phenotypes, with anoptimal cutoff point of 3.5 ng/mL (area under the curve (AUC) = 0.659,sensitivity: 45.9%, specificity: 83.7%).