BAG3 and familial dilated cardiomyopathy: We identified 6 ACM cases with rare, protein-altering variants in other DCM genes: 1 carrying a BAG3 truncating variant previously reported in DCM (25) and classified as pathogenic for DCM under current variant interpretation guidelines from the American College of Medical Genetics and Genomics and the Association for Molecular Pathology (Online Tables 3A and 3B) (26), 1 carrying a novel BAG3 missense variant, 1 carrying both a TTNtv and a novel LMNA missense mutation, and 3 cases each carrying different MYH7 variants.