Welcome - you typed just the right amount here for us to get started. Conversion disorder? Really? Do you know how rare that really is but how often it is used? WE have a great health page here on that very topic that deconstructs the whole theory -
http://www.medhelp.org/health_pages/Multiple-Sclerosis/So-they-think-youve-got-conversion-disorder/show/1137?cid=36
See the psych and get the all clear that you are not suffering conversion disorder so you can get on with finding answers.
Microvascular dysfunction is a topic I know because I have angina, perhaps cardiac syndrom X and had a heart attack due to unknown causes. I have NONE of the usual cardiac problems as blocked arteries, etc. But microvascular dysfunction can also be a very quiet problem that causes little distress.
Neuro malfunction most definitely can be connected with cardiac issues - lack of oxygen to the brain can create havoc as you know. Vascular insufficiencies can also ischemic changes i nthe brain.
That said, I definitely had a cardiac event AND I was diagnosed with MS the same year. So don't think you can only have one problem at a time.
Optic neuritis is a clear sign that something in your system is attacking itself and you need answers to get it to be slowed or stopped. ON does NOT occur with cardiac problems and is a separate disease process entirely.
I hope you will continue talking to the therapist and get the all clear on the conversion disorder talk so you can concentrate on these other problems.
Stick with the MS doctor and don't go back to the general neuro is my advice, but I'm no doctor. Good luck and keep us posted with your updates and feel free to ask questions.
be well, Lulu