RSD Ischemic Colitis Connection

I've had RSD for 12 yrs with wildly fluctuating symptoms including nerve pain and autonomic dysfunction which brings on bouts of severe hypertension. I also have central apnea and haven't been able to find a mask that's small enough to keep my machine from beeping all night.

Recently, I had a 2nd bout of ischemic colitis, apparently caused from one of my heart valves malfunctioning.  

Any ideas as to whether any of this c/b connected in any way?  Along with the colitis episode I've had a resurgence of nerve pain in my feet and legs, and hypertension.

Thanks for any help you can be.  Incidentally, my fingernails are all coming detached from the nailbeds as well - this has been happening for several years, and some of them are almost off.  Could this also be related to heart trouble?  I'm a 48 y/o female.