Does it ever happen that a 19 year old have a heart attack?

Heart attack: It is possible for a 19year old to have a heart attack but it is relatively unusual. Often there is a family history of premature coronary disease or congenital arterial malformation. That said, most cardiologists see a heart attack in a teen ager at some point in their career.

Rarely : There are a few conditions where a 19 yo could have coronary artery occlusion and a heart attack similar to a 60 yo.(progeria, kawasaki) there are also various congenital and heart disturbances where a teen could develop a sudden rhythm disturbance and present a similar set of symptoms. Added together these are still rare, but worthy of consideration when a teen goes down suddenly.