GSTP1 and hydrops fetalis: Likewise, the degree of endothelium-dependent NO-mediated vasodilation and endothelium-independent nitroglycerin- (NTG-) mediated vasodilation of the brachial artery was similar between CAD-related HF patients with either the GSTP1 wild-type genotype and carriers of at least one variant GSTP1 allele.