Different than adult. The type of heart disease seen in teenagers is different from that seen in adults. Some problems are congenital (born with them) that only become apparent in the teenage years. Some common diagnoses include hypertrophic cardiomyopathy, myocarditis (viral infection), pericarditis, and Marfan syndrome. There are variety of congenital metabolic disorders which are uncommon such as glycogen-storage.
Cad. Coronary disease is very unusual in teens. Possible cause include congenital malformations of the coronaries or an arteritis which is an inflammatory condition of the arteries.