In particular, incorporating the analysis of CNVs involving recommended genes for CMPs and CNPs, namely MYBPC3 (for HCM) or PKP2, DSC2, and DMD (for ACM and DCM) or SCN5A, KCNQ1, and RYR2 (for CNPs), into routine diagnostic workflows could aid in resolving unsolved cases or expedite the referral toward more in-depth analyses, such as WES or WGS. The gene discussed is KCNQ1; the disease is familial dilated cardiomyopathy.