Any familial isolated dilated cardiomyopathy in which the cause of the disease is a mutation in the SDHA gene. The disease is MONDO_0013339 (dilated cardiomyopathy 1GG). Also known as: CMD1GG, SDHA familial isolated dilated cardiomyopathy, cardiomyopathy, dilated, type 1Gg, dilated cardiomyopathy type 1GG, familial isolated dilated cardiomyopathy caused by mutation in SDHA.