We investigated gene expression differences between DCM and donor samples for the well-known DCM-related myosin heavy chain genes MYH6 and MYH7. We confirmed that the fraction of the adult MYH6 transcripts among all myosin heavy chain RNAs is, on average, around 10% in donors and virtually absent in the DCM patients [25] (Additional file 1: Figure S1). This evidence concerns the gene MYH6 and familial dilated cardiomyopathy.