Survivor of Aurora Shooting Saved by "Birth Defect"

General Blog
1

Horrible event, but does anyone know the details of Petra Anderson's "birth defect". Was this AVM?

2

http://www.huffingtonpost.com/2012/07/23/aurora-shooting-survivor-_n_1695792.html

3

They don't really say in the video. They just say it's a vein that's a birth defect[?]