its sad, but i would assume that heart attacks at a young age are generally due to genetic heart conditions (like enlarged heart, etc) or drug use, so while its not an inevitability, its significantly more likely than others.
http://www.ronsuskind.com/newsite/ar...es/000038.html
this article is basically all about the reggie lewis death, and most doctors think it was because of cocaine use.
"Dr. Munn guided the others, but there wasn't much need: On the left ventricle of Mr. Lewis's heart were three black patches -- dead spots. Such dead tissue is most commonly caused by arteriosclerosis, mostly in older patients, or by viruses, drug use or a previous heart attack."
if i had all the evidence from the future, i would have guessed grant hill at 24 to be the 65 game/year type of player with the non-trivial chance of a career threatening injury every year (probably increasing each year it didnt happen)
and assani: these clones that we're making, they inherit whatever damage the body has on it at 24, right?