An overlap was observed in 7 of 82 families (8.5%) where molecular autopsy and clinical evaluation of family members resulted in the same diagnosis: CPVT in 4, LQTS in 2, and BrS in 1 (see Online Figure 1, Family 6 for segregation of SCN5A variant). This evidence concerns the gene SCN5A and catecholaminergic polymorphic ventricular tachycardia.