This week we explore heart conditions that have dramatically altered the lives of footballer Fabrice Muamba and cricketer James Taylor. We tell the stories of both sportsmen. Furthermore, we assess Sudden Cardiac Death and the conditions that can lead to it, including Hypertrophic Cardiomyopathy and Arrythmogenic Right Ventricular Dysplasia. We look deeper into the athletes who have been affected by the conditions, how they are diagnosed and the research into them.