I've done both the Cath Lab and Education. They are very different. I enjoyed the cath lab but wearing lead caused a bad back injury. Be ready for long days and being on-call. I am currently a nursing educator for a very large outpatient medical group. I use my clinical experience every day and it requires a lot of critical thinking. Having a family, I enjoy the M-F schedule with no holidays. I've been in education for 17 years and plan to finish my career in this area.
Those are 2 opposite ends of the spectrum. Unsure of your location but most Cath Labs you have to take call, which was not desirable to me. With all your years of experience, I would say education for the most normal schedule and sharing your knowledge to others.
Love the cath lab. I say go for it but just along as you're willing to take call. You can also do EP, there's usually no call there.
I worked ICU for 11 and transitioned last year to Endoscopy. I like it a lot. Cath lab was my other choice because I have a strong cardiac background so I say give that a shot!