AGT and hydrops fetalis: Each of the biomarkers—MHR, NGAL, and Ang II—was linked to an increased risk of mortality at one month (OR = 1.007, 95% CI: 1.003–1.012), (OR = 1.004, 95% CI: 1.001–1.007), (OR = 1.002, 95% CI: 1.001–1.004) and at one year (OR = 1.007, 95% CI: 1.002–1.011), (OR = 1.004, 95% CI: 1.001–1.008), (OR = 1.003, 95% CI: 1.001–1.006) in the elderly patients with HF.