That depends...
Triggers won't 'see' them, but if you have named the dead, you still may have some 'control' over them...
Try it like this:
Make a trigger activated by, say, radio Alpha.
Then on that triggers on act. field put deadDude setDamage 0
Then put a soldier on the map and name him deadDude, shoot him and press 0-0-1, and he should bounce back to life...
But as you didn't say how you would like to 'use' the dead so...