For the first time ever, scientists have been able to observe the speed at which death spreads across a cell once the self-destruct so-called “trigger wave” has been initiated. Death moves at around 30 micrometers per minute or 2 millimetres an hour. Read full article...
Source: https://www.newscientist.com/article/2176397-we-have-measured-the-speed-of-death-and-its-2-millimetres-an-hour/This is very very tiny data to talk about such thing.... if possible want to see more about this
if this is the case then patient might have dead few day before he actually die.......
When someone is dead..their brain activity is zero..but cells of all the body do not die at that very time (their skin would be fresh at the moment) but after tjat this trigger wave they are talking about spreads to every cell in the human body..so it s litteraly cell death* they r talking about!