Echocardiographic imaging was performed simultaneously with serum samples obtained for asymmetric dimethylarginine, symmetric dimethylarginine, monomethyl-L-arginine, arginine and its metabolites, and galectin 3 levels in 80 patients with bipolar disorder who were euthymic for at least 8 weeks and 69 patients with schizophrenia undergoing treatment. The gene discussed is LGALS3; the disease is bipolar disorder.