I'll have to admit that I was more anxious about the cath than I was about the surgery itself. Probably because I knew for many years I would need surgery and the cath might show even more repairs needed. Mine did show an artery partially blocked. They said that absent my need for valve surgery, I would have needed a stent in a few years, but since I was going in for valve surgery, they did a single bypass. After it all, I'm glad to have that taken care of sooner, rather than later.
Also, I guess there's always a fear of the unknown, and fear of discomfort and loss of dignity. All of these proved to be totally uncalled for. In my case, not only did the procedure go smoothly and well, but it was interesting. And, with the newest post-procedure closures, I only had to be flat on my back for a couple of hours.