We conducted a prospective 7-year follow-up study to investigate the evolution of ventricular function, myocardial fibrosis, and arrhythmias.<h4>Methods</h4>34 women with confirmed pathogenic DMD gene variants (19 predicted to cause Duchenne muscular dystrophy and 15 Becker muscular dystrophy) underwent assessments after a mean of 7 years. The gene discussed is DMD; the disease is Becker muscular dystrophy.