RBM20 and familial dilated cardiomyopathy: The presence of LGE on CMR is prevalent in patients with DCM when there is an underlying genetic aetiology, although this is found rarely in MYH7, RBM20, and TNNT2.20 In addition, patterns of LGE can point towards certain likely causative genes (ring-like, subepicardial vs mid-wall patterns).20 Screening with CMR is advised in genotype-positive family members, but especially in those with FLNC, PLN, and DSP variants (i.e. genes associated with a high-risk arrhythmic phenotype).