Scrub or Circulating experience for RNFA school

I'm not sure that cath lab would "count" or be fully applicable. While in general, there is a huge push to perform as many procedures as possible as minimally invasive as possible - I don't think that only cath lab experience will help you. It is incredibly unlikely that you would see any true open procedures and your experience handling and identifying instruments would likely be far less robust than if you worked in the OR.

I would personally go to the OR if RNFA is my goal. Most likely, you would be working in the OR as an RNFA, and that means you need to be familiar with the environment. It would be unfortunate to bother to get into and even potentially finish school and decide you can't stand the OR. In the OR you'll handle instruments, possibly see some of the anatomy you need to learn to identify, see things you'd need to learn, etc.

FYI - check not only the requirements of programs, but what the state board requires in your state. Keep in mind that individual hospitals are different and maybe even more strict than the state board requirements. For example, we have some NPs who can function in the FA role - no surg tech or RN assists - have to have the education and licensure of a PA or NP. The state allows RNs with completion of a training program to function in the FA role.