I'm sorry you had so much discomfort, Simon. I think they choose from groin and wrist for the insertion. I'm guessing yours was groin. I don't know how they decide, but mine was in the wrist and although I was aware of the possibility of the effects you described, I was lucky enough not to get any of them. I also got a good result: my heart is wrecked but it's not because of coronary artery disease!
I'm glad you seem to be getting such speedy intervention with the procedures. I had my TIA in July 2019 but in spite of the anxiety and recommendations of two echo-technicians that I be seen immediately by a cardiologist, I had to go private in December to see one. He it was who ordered an angiogram on the NHS, which I had in February. I still haven't seen a "doctor" face to face, since August 2019 (except the appointment with the private specialist) though I get regular medication checks. This is done by a team of excellent nurse-practitioners, over the phone since Covid. I'm hoping to get an echo again soon to see if the drugs have actually improved my heart function as opposed to solely arresting the deterioration. It can happen. I feel fine and cycle regularly (and. I hope, sensibly - I was relieved when they cancelled Paris-Roubaix!).
I'm hoping that the lack of urgency is partly down to the judgement that (EV of 8% notwithstanding) I don't represent an emergency but it would do me the world of good to have the back up of an improved echo. My heart rate is still all over the place but I don't feel any of that. blood pressure's fine, too.
I'm hoping for the best for you Simon! I think heart treatment is one of the great success stories in medicine and it looks like we've both been "got" soon enough.
Best wishes,
Peter