In addition to gene mutations of SCN1A that can cause DS, other genes include PCDH19, SCN2A, SCN8A, SCN1B, GABRA1, GABRG2, GABRB3, STXBP1, HCN1, CHD2, and KCNA2 can also cause DS or DS-like phenotypes (4). This evidence concerns the gene KCNA2 and Dravet syndrome.