e. CACNB2, GPD1L, KCNH2, KCNJ8, KCNQ1, RYR2, SCN5A and TRPM4), whereas 15 cases had one (n = 11) or two (n = 1) variants in cardiomyopathy genes (i. The gene discussed is KCNQ1; the disease is cardiomyopathy.