Nineteen channelopathies were identified, affecting the following genes: <i>KCNMA1, KCNN3, KCNT1, KCNT2, KCNJ10, KCNJ6, KCNJ11, KCNA2, KCNA4, KCND3, KCNH1, KCNQ2, KCNAB1, KCNQ3, KCNQ5, KCNC1, KCNB1, KCNC3</i>, and <i>KCTD3</i>. The gene discussed is KCND3; the disease is channelopathy.