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Hyperhomocysteinaemia is not associated with increased levels of asymmetric dimethylarginine in patients with ischaemic heart disease

Background Elevated plasma total homocysteine appears to be related to endothelial dysfunction and impaired nitric oxide production. We aimed to investigate [ 1 ] whether elevated levels of plasma total homocysteine are associated with high plasma levels of asymmetric dimethylarginine, an endogenous inhibitor of nitric oxide synthase, and [ 2 ] whether reduction of plasma total homocysteine levels by folate and vitamin B supplementation lowers plasma concentration of asymmetric dimethylarginine.