Edgar Allan Poe was a very anxiety ridden man. He died in the most fearful way you can imagine, in something called Delirium Tremens.
It occurs when, a long time abuse of alcohol is followed by a sudden abstinence. And your body goes into some kind of hypersensitive shock. You can see the most horrifying hallucinations of rats and snakes and cockroaches coming out of the floor and worms slithering on the walls. Once the entire nervous system is on high alert, and you have a constant panic and paranoia and the circulatory system fails.
But the panic and horror… remains until the moment of death.