Ridiculous, Seriously? I've been around a bit when it comes to heart hospitals, when I was in the hospital with my brother (first 9 months of his life) and the severity of needing after-care and of course the operations which doesn't necessarily mean you'll need one you'll most probably need more.
Because his saturations were low (oxygen levels were low) the first open heart op never worked and needed a second. then a third and a fourth so it's vital (as you know you must have did the research) that you'll most likely need more than 1 op.
That's the good thing about the UK I have to say, When it comes to health care they are excellent it's one of the best heart specialist hospitals in the UK.
http://en.wikipedia.org/wiki/Glenfield_Hospital
Hopefully everything works out for the better for you redline.