Cardiac issues are generally reasons for disqualifying you from a Class I medical. However, after a cardiac event or procedure you can apply for a Class I special issuance medical. It is a conditional medical given and you have to fulfill all the testing they require and jump through all the hoops to maintain it. There is a website. Google special issuance FAA medical and you will get lots of info. There are a few medical clinics who specialize in getting your medical back. AOPA medical I'm told is very helpful.
P.S. FAA has a waiting period to apply after a procedure. usually 6 months.
I am not sure how old you are, but being a pilot I would say you are probably keen on knowing what the heck is going on. Unless you have some other major medical reason for doing the CC, I would, just to know what exactly you are dealing with. Yes it is invasive, but the results are conclusive.