LMNA and familial dilated cardiomyopathy: LGMD1B is autosomal dominant and associated with AV conduction defects, supraventricular arrhtyhmias, and ventricular arrthythmias, but late-onset DCM (Muchir et al., 2000; Lu et al., 2011) and SCD (Finsterer et al., 2015; Groh et al., 2022) have been reported.