As expected, in comparison with the remaining population study, patients with HF have a lower peripheral O2sat: 85.5 ± 11% vs 94.0 ± 3.1% p ≤ 0.001, higher ln-nt proBNP 5.6 ± 0.87 vs 4.48 ± 1.183 p = 0.037, and a higher amount Aortopulmonary collaterals flow 0.9 (0.5, 1.3) vs 0.6 (0.3,0.9) p = 0.034. The gene discussed is NPPB; the disease is hydrops fetalis.