Out of these 30 genes, 16 are referred to as core genes [23]: CASQ2 in CPVT Autosomal Recessive (AR)) [25]; DSC2, DSG2, DSP, PKP2 and TMEM43 in ARVC [26]; FLNC, LMNA and RBM20 in DCM [27]; KCNH2 in SQTS and LQTS [27, 28]; KCNQ1 in LQTS; MYBPC3 and PRKAG2 in HCM [29]; MYH7 in HCM and DCM; RYR2 in CPVT; and SCN5A in BrS, DCM and LQTS [30]. The gene discussed is RYR2; the disease is familial long QT syndrome.