In another multicentre study of 74 RBM20 mutation carriers, there was a considerable family history of SCD (51%) and patients with RBM20 mutations were more likely to have NSVT (43% vs 11%) and sustained VT (25% vs 2%) than idiopathic DCM cohorts [75]. This evidence concerns the gene RBM20 and familial dilated cardiomyopathy.