SCN5A and catecholaminergic polymorphic ventricular tachycardia: The present observations in Pgc-1β−/− hearts parallel features reported in Scn5a+/− and RyR2-P2328S/P2328S cardiac models for Brugada syndrome and catecholaminergic polymorphic ventricular tachycardia, respectively [33–35, 39].