SCN5A and cardiomyopathy: The observation that BrS affects both ventricles, and that RVOT dilatation is a feature shared by all BrS patients, regardless of the presence of a SCN5A mutation, may be taken as supportive evidence for the notion that BrS should be considered a cardiomyopathy with predominant but not exclusive involvement of RV, similar to arrhythmogenic right ventricular cardiomyopathy.