That will depend on where it is and how fragile, my own case is unusual, I had a haemorrhage at only 13 months old, major surgery in 1988, still have 2 AVMs so not symptom free, but am now 63. Provided I don't take silly risks, I do hope to have a reasonably normal life expectancy. I do know there is increased risks of dementia, TIA etc, I do lots of brain training, puzzles etc. The biggest danger is ignorance by some medical professionals on the side effects as this is a rare conditon.