Hello, SSoul. I just had my bicuspid aortic valve replaced 2 weeks ago today! My valve was diseased with severe aortic stenosis (kind of the opposite thing from AI). For the last 6 months, while sleeping, I would go to sleep feeling the tingling and wake up with my arms asleep and aching. Hadn't thought about this until you just brought it up, but post surgery, those sensations are gone!!
Another change, though, is that for now, I am sleeping sitting up. I can't say whether those annoying sensations will return when I get back to my side sleeping. Maybe you could try sleeping sitting up abit.
If you have been told to take an asprin a day by your doctor, you might try taking it at night to help the blood flow somewhat.
If you find you are having leg cramps while lying down (those, too seem to have vanished for me.......hate to jinx it.......everything still so new) you might ask your internist for some quinine sulfate (NOT quinadine which is something entirely different). Quinine (which I am suggesting) was actually used to treat malaria. It is found in small doses in Tonic Water (the non-alcoholic mixer for the likes of gin and tonic, vodka tonic, etc.) I don't think it would help the numbness, but it couldn't hurt to try.
Obviously this is all just from personal experience and has no medical backing at all as I never mentioned the numbness to any doctor. The Rx for quinine sulfate did come from a doctor after complaint of leg cramps. I don't think it's any indication of how far along your problem has progressed or anything. I do know that there were a few of us who have experienced the numbness pre-surgery.......we're all just recovering now, so it's hard to know if it's gone, yet.
Hope this helps!
AVR 4/18/06, age 52. Bovine tissue. CE Perimount RSR Model 2800. 23 mm. BAV diagnosed age 27(1981). Moderate stenosis (1.0 cm) 9/03; severe stenosis (.7cm) 12/05, Aortic measure at surgery 4/06, critical (.53 cm)