On this subject, a recent study reported a CNV detection rate of 4.4% (6/136 patients) including deletions and duplications in key DCM genes, such as DSP deletion spanning exon 21–23, and Dystrophin (DMD; OMIM *300377) duplication, spanning exons 45–62 [32]. Here, DMD is linked to familial dilated cardiomyopathy.