dilated cardiomyopathy 1M (Monarch Disease Ontology entry MONDO_0011840) is any familial isolated dilated cardiomyopathy in which the cause of the disease is a mutation in the CSRP3 gene. Also known as: CMD1M, CSRP3 familial isolated dilated cardiomyopathy, cardiomyopathy, dilated, type 1M, dilated cardiomyopathy type 1M, familial isolated dilated cardiomyopathy caused by mutation in CSRP3.