Can someone stop the cause of death after someone writes the details in the Death Note?


Let's say I had a Death Note. If I wrote someone's name in the book and then
wrote details of the death, can an individual stop the cause of death and the
actual death entirely or will the death still take action, but in a different
way?




The Rules of the Death Note are pretty clear:

> [How to Use:
> XI](http://deathnote.wikia.com/wiki/Rules_of_the_Death_Note#How_to_Use:_XI)
>
> […]
>
> As you see above, the time and conditions of death can be changed, but once
> the victim’s name has been written, the individual’s death can never be
> avoided.

This is, of course, as long as you thought of the victim’s face while writing
the name. In case you now assume that you can just alter the details of death
to something impossible, well sorry:

> [How to Use:
> LV](http://deathnote.wikia.com/wiki/Rules_of_the_Death_Note#How_to_Use:_LV)
>
> […]
>
> In the occasion where the cause of death is possible but the situation is
> not, only the cause of death will take effect for that victim. **If both the
> cause and the situation are impossible, that victim will die of heart
> attack.** [emphasis mine].

So again, all you get is a heart attack. The victim will die.

Tl;dr: Think before you write.

