Duchenne muscular dystrophy is the most common and severe form of muscular dystrophy. According to Nemours KidsHealth.org, it affects boys more often than girls. According to the Muscular Dystrophy Association, heart and respiratory muscle problems emerge in the teen years and can lead to serious complications. In terms of the heart, the issue at hand is cardiomyopathy. Dr. Takeshi Tsuda is a pediatric cardiologist at Nemours Children’s Health who studies cardiomyopathy in boys with Duchenne....