Mutations in the Sodium voltage‐gated channel alpha subunit 5 (SCN5A) gene have been associated with the development of DCM, a total of 12 family members (10 males, 83.3%), 2 of them carriers of the p.Asn1474Lys variant in the SCN5A gene.222. Here, SCN5A is linked to familial dilated cardiomyopathy.