The risk of developing cardiomyopathy increases with age [6], so cardiomyopathy is a potential problem that needs attention in female DMD variant carriers.Other study in MCs showed the incidence of cardiomyopathy was 7.3-16.7% and 0-13.3% for DMD and BMD, respectively [2]. The gene discussed is DMD; the disease is cardiomyopathy.