AGTR1 and hydrops fetalis: For the A1066C AGTR1 gene polymorphism under the codominant model, the risk of HF in the group with NYHA Class I/II was reduced 2.5-fold among the A/C heterozygotes compared with the A/A homozygotes (OR = 0.40, 95% CI 0.19–0.80, p = 0.021).