Study sheds light on pathological characteristics behind sudden cardiac death Nearly a half-million people a year die from sudden cardiac death (SCD) in the U.S. -- the result of malfunctions in the heart's electrical system. A leading cause of SCD in young athletes is arrhythmogenic cardiomyopathy (ACM), a genetic disease in which healthy heart muscle is replaced over time by scar tissue (fibrosis) and fat. Stephen Chelko, an assistant professor of biomedical sciences at the Florida State University College of Medicine, has developed a better understanding of the pathological characteristics behind the disease, as well as promising avenues for prevention. His findings are published in the current issue of