I've honestly tried. After what has me crippled for 3 years first happened, my body was weak and frail and entirely bedridden, and I thought I might be dying from pain/shock alone, so I tried to will that to happen. I even researched it to see if anyone has had that happen or made it so. Evidently, it might work in the classic case of old people where one dies and the other goes a month or so after from grief. But they are also old. I am under 40, so I guess all the pain, shock and trauma I endured was not enough strain on the organs that give that heart attack or stroke.
Now I am being absurd enough to try the opposite: will the body to heal. And I am likely going to get the same results: nada.