I have ATOS and I'm going through the conservative care route for various reasons.

Unfortunately, I cannot answer your questions even though I empathize with you. I have also not found what the risk factor for stroke is in the literature. And I cannot tell you what your risk factor is. I don't even know mine!

If you look through my previous posts, you'll find me sharing tips on what has helped me, though I am not cured and don't know that I ever will be.

One extra tip. Many of my head symptoms were caused by TMJD and I didn't even know it. My TMJD in turn was caused mostly by muscular tension in the neck and around the jaw. As I have gotten those to relax, my head symptoms have greatly reduced.

Diazepam, breaks, stretches, destressing, muscle relaxation meditation, magnesium and manual therapy were all key to bringing the muscle tension down.

You can PM me if you need to.