My experience is along the lines of several statements people here already mentioned. More details below.
For me it was a positive experience. No problems. Done quickly. .... The worst thing was grogieness from the sedatives.
I also had "awake sedation". Could talk to the cardiologist performing the procedure and tell her about my sensations (felt a minor pressure). But standing up afterwards was not quite easy. They did have an appropriate protocol for the patients: a guided walking, a requirement for somebody else to drive you home, etc.
This is a very routine prodecure. It should be no cause for worry. You will be awake, but they will give you a sedative so that you will be nice and relaxed.
Indeed, the procedure seems to be a simpler version of stenting, with same tools (but no actual stents). And the stenting is VERY popular (like 600,000 procedures in the US, if I recall correctly, more than the number of heart surgeries even).
They put me into the category of “no cardiovascular disease” and nothing else had to be addressed in the upcoming AVR. That said, “no cardiovascular disease” doesn’t mean that there is no clogging. It just means that the amount of clogging was “nothing” to them. I believe that I had 10% clogging in one of the arteries and 20% in two other arteries. To them, that was great news.
I find such information to be
very important. The "minor" (small-area) clogging is not worth the increased risk for adding the bypass to the valve surgery. But it's good information to know, since then one can treat it with statins. So that your chances of a heart attack decades later are reduced. Unfortunately, it seems that you can only get the information about these small cloggings with the angiography methods, which are not commonly done. Since you are getting it done, you'd be ahead, in some sense.