Not to be a know-it-all, but technically fear of heights is not Vertigo, its called Acrophobia. Related to CSA? I don't know, but anything's possible in our F-ed up world.

Vertigo is a malfunction of the balance mechanism of the inner ear, which produces a sensation of spinning and falling through space. I had an attack of it a month ago, and it totally disabled me for three days, until it finally passed.

Jude
_________________________
Seems I've got to have a change of scene
Every night I have the strangest dreams
Imprisoned by the way it could have been
Left here on my own or so it seems
I've got to leave before I start to scream
Joe Cocker