"We presume the cause of death was heart failure stemming from exhaustion," a Taegu provincial police official said by telephone.
Being in the healthcare field, this explanation doesn't really make sense. There has to be more to the story than the way it's being portrayed.
It's hard to read things in press & figure out the true medical facts.
Unfortunately, the unintended side-effect of reporting it like this is that people will begin to think, "I shouldn't play video games too long b/c it might cause me to die."
The cause-and-effect that is being implied in the story is just incorrect.