^^^more likely downer overdose, opiates and alcohol and such... i'd put money on it actually. young people's hearts even with a lot of abuse are strong, it takes a lot of hell for a young heart to weaken to the point of arrest. but if you stop breathing it doesn't matter how strong your heart is.
it's what most drug overdoses are from actually, and its common among people who use uppers like coke and meth because they need downers to relax and sleep. especially because lots of people are fairly careful with their pills but alcohol is so ingrained in our culture and freely available people don't consider that the two together are a recipe for death.
Everybody good, plenty of slaves for my robot colony?