Hypertrophic cardiomyopathy (HCM), a heart-related abnormality, is the most common cause of sudden death in young athletes at sporting events.

WHITEHOUSE: Engage and Connect

Among them are hypertrophic cardiomyopathy (HCM) - a hereditary condition in which there is excessive thickening in the heart muscle, myocarditis, which leads to inflammation of the heart muscle and coronary artery disease.

BBC: NEWS | Health | A matter of young life and death