TNF and hydrops fetalis: In both groups, the TNFα polymorphism was not significantly correlated with any clinical or other biochemical parameters. PPARG2 Ala was related to a longer distance in the 6-minute walk test, but only in patients of the HF group before and 1 month after CABG (424 ± 62 m in PPARG2 Ala vs. 394 ± 59 m in PPARG2 ProPro before CABG, p=0.025, and 417 ± 100 m vs. 383.4 ± 84 m, p=0.01, respectively).