title: Natural course of cardiomyopathy in Duchenne muscular dystrophy.
mesh_terms: D000293:Adolescent; D000367:Age Factors; D009202:Cardiomyopathies / Q000209:etiology / Q000503:physiopathology*; D002648:Child; D004452:Echocardiography; D004562:Electrocardiography; D006321:Heart / Q000503:physiopathology; D006801:Humans; D009136:Muscular Dystrophies / Q000150:complications*; D013997:Time Factors