Mutations in four of these genes, i.e. GPD1L, MOG1, SNTA1, CAV3 have been linked with AF [4] and long QT syndrome (LQTS),[5, 6] Brugada syndrome (BrS) [7] or sudden infant death syndrome (SIDS) [8]. The gene discussed is CAV3; the disease is familial long QT syndrome.