An appointment, in hospital, for a heart ultra sound scan, requested by the surgeon, who is soon to do the catheter insertion job. Idea was to check my heart, in operation, due to some doubt, that I might not be able to survive a general anaesthetic, during the catheter operation - the surgeon (and me) would prefer it if I were out cold for it.
The doubt, was first expressed, when I went in for a kidney stent installed, several years ago. They said they didn't want to take the risk of attempting it, as they usually would, under a general anaesthetic, and so did it under a local. In the midst of the OP, I had a bit of a 'funny do', where I almost lost consciousness, so the OP had to be paused for a while, whilst I recovered.