KCNJ8 and Brugada syndrome: Genetic variants of other genes, including GPD1L, SCN1B, SCN2B, SCN3B, RANGRF, SLMAP, KCNE3, KCNJ8, HCN4, KCNE5, KCND3, CACNA1C, CACNB2B, CACNA2D1, and TRPM4, may also underlie Brugada syndrome.