Hi Al
As Fdeg said I had a successful Mitral Valvuloplasty done in September of 2002. You're kept awake throughout the procedure but obviously given some sort of seditive to keep you in "la la land". However the drugs really didn't seem to do anything for me, and I unfortunately remember pretty much the whole thing. I started off by having a panic attack that lasted throughout the procedure and they kept pumping me with drugs to try and keep me calm. Oh well it's the thought that counts right?
Anyhoo, I think it's a pretty simple thing. They insert a balloon tipped catheter into a hole they make in your groin and feed it up into your valve, position it, and then inflate the balloon. I believe it's pretty quick, and provided you have enough sedation, rather painless. Because the incision is so small you don't require any stitches. However you do have to spend a night in the hospital and have to spend quite a few hours of it flat on your back...listening to your room-mates husband clunk around the room, talking, and eating something from a crinkling paper bag until all hours of the night. Oops, back to the topic.
My doctor said that my Valvuloplasty should last me approximately 10 years (give or take) and at which time, I would possibly be a canditate for another Valvuloplasty or just have the valve replacement. As far as the success rates go, I really think it has to do with if your doctor thinks you're a good candidate for it in the first place.
I live in Canada so obviously I had mine done here. However in case you're into paying high Canadian prices and travelling I had mine done at St. Michaels Hospital in Toronto and it was done by Dr. Robert Chisholm.
Even though I remember the whole thing, and DID feel the pain of it, I would ABSOLUTELY do it all over again. Without the panic attack though.
Hope I helped. Take care.
p.s. My Mitral valve area went from 1.5cm² to 2.38cm²