Any familial isolated dilated cardiomyopathy in which the cause of the disease is a mutation in the MYH6 gene. The disease is Monarch Disease Ontology identifier MONDO_0013198 (dilated cardiomyopathy 1EE). Also known as: CMD1EE, MYH6 familial isolated dilated cardiomyopathy, cardiomyopathy, dilated, type 1Ee, dilated cardiomyopathy type 1EE, familial isolated dilated cardiomyopathy caused by mutation in MYH6.