Much less represented phenotypes are LQTS/CPVT overlap (1 case, CALM2-p.D132E), IVF (1 case, CALM1-p.F90L), and SUD (2 cases, CALM2-p.F90L, CALM2-p.N98S). Here, CALM2 is linked to catecholaminergic polymorphic ventricular tachycardia.