Hayashi et al. also described a patient with both diagnostics, BrS and SSS, and reported that BrS may be an arrhythmogenic disorder involving not only the His-Purkinje system and the right ventricle but also the sinus node and the atrium, derived from variants in ion channels such as the sodium channel gene SCN5A. In addition, arrhythmias, such as atrial flutter in BrS, are usually seen with SCN5A variants [39, 40]. The gene discussed is SCN5A; the disease is atrial flutter.