How does this resolve in general? How do you plan to find out whether this happened?

How does this resolve if the person died of a heart attack while dehydrated or malnourished, but it's not clear if that is the cause vs sleep deprivation or other stresses?

Will someone fail to hydrate/eat, dying as a result, because they could not perceive reality, their hunger, or their thirst, while using a social media network in the next 10 years?, 8k, beautiful, illustration, trending on art station, picture of the day, epic composition