My Mum had this when she was in her early 90s and after the angiogram result they decided to carry out an angioplast at the same time - she went as an out patient but because they were so late in the day getting round to her they kept her in overnight because of her age. It was successful and a painful complaint of several years standing disappeared completely (the angiogram/plast was recommended when she moved house and got a new GP, the previous one dismissed the problem as "getting old"). I was allowed to accompany her right up to the annex of the Operating Theatre (obviously no further), and the pre-op surgeon was one of the kindest people I've ever met. There are LOTS of good people in the NHS.