I'm stuck...

I feel like this is a letter I should be writing to a yoga magazine but I might get more immediate (and better) results posting here. In the past I have been vocal about lower back pain and my heart issues. The lower back issues didn't start until a couple of years ago but it is not chronic so I don't talk about it THAT much but as you might know when your back hurts it pretty much disrupts your whole being of existence.

I've written about my wrist problems doing a Wheel. Backbends in general have been freaking me out more and more. Back bending involves chest opening correct? Chest openings can draw a lot of energy. I don't want to crunch my lower back in a back bend but if I focus more on my chest and open up, my heart starts to beat FAST and sometimes even get light-headed. When you have Thoracic Aortic Aneurysm, I guess I can't take this lightly. So I don't want to hurt my back but I don't want to cause my heart stress either.

So what do I do? Where should I focus my attention? I worry that I am becoming more and more limited in my physical practice.