Though statistical significance was not reached, NT-proBNP levels were lower after TAVR for the HF/HG and LF/LG groups (HF/HG: 3823.9 ± 3966.3 vs. 2669.7 ± 2163.26, p = 0.28; LF/LG: 6822.5 ± 4844.9 vs. 6580.3 ± 6146.5 pg/ml, p = 0.85). The gene discussed is NPPB; the disease is hydrops fetalis.