Hi Rod3,
I have a very similar diagnosis, EiPH; however, mine is not arterial.
I was told by my cardiologist to get in 30 minutes of exercise, mainly walking, doing it at a slow, painfully slow, pace. I am to keep my heart rate below 130.
I’m not sure this helps, but wanted to share what I was told.
Best wishes on this journey we all are taking!
Sue