Mutations in SCN5A have been linked to various cardiac arrhythmic syndromes ranging from acute life-threatening tachyarrhythmias to bradyarrhythmias: the congenital long QT syndrome subtype 3 (LQT3) [7], [8], Brugada syndrome (BrS) [9]–[11], isolated cardiac conduction disease (CCD) [12], and sudden infant death syndrome (SIDS) [13]. This evidence concerns the gene SCN5A and sudden infant death syndrome.