TNFRSF1A and hydrops fetalis: The significantly lowest expression of pro-apoptotic factors: Bcl-2-associated X protein (Bax), p53, tumor necrosis factor receptor 1 (TNFR1), and caspases 3, 8, and 9 and anti-apoptotic mitochondrial factor—Bcl-xL was observed in the group of patients with preserved left ventricular function and increased with progression to HF.