title: Observations on the electrocardiogram in Duchenne's progressive muscular dystrophy.
mesh_terms: D000293:Adolescent; D001706:Biopsy; D002490:Central Nervous System / Q000502:physiology; D002648:Child; D002675:Child, Preschool; D002869:Chromosome Aberrations / Q000175:diagnosis; D025063:Chromosome Disorders; D004562:Electrocardiography; D006321:Heart / Q000502:physiology; D006327:Heart Block / Q000175:diagnosis; D006801:Humans; D001523:Mental Disorders / Q000209:etiology; D009136:Muscular Dystrophies / Q000145:classification / Q000473:pathology / Q000503:physiopathology*; D013997:Time Factors