Disease-causing variants in 15 genes were identified in people with DCM in the following genes: TTN (MIM 118840), LMNA (MIM 150330) DSP (MIM 125647), TNNT2 (MIM 191045), RBM20 (MIM 613171), PLN (MIM 172405), DMD (MIM 300377), ACTC1 (MIM 102540), TMEM43 (MIM 612048), MYO6 (MIM 600970), MYH7 (MIM 160760), MYBPC3 (MIM 600958), CRYAB (MIM 123590), and BAG3 (MIM 603883). The gene discussed is ACTC1; the disease is familial dilated cardiomyopathy.