I feel your pain... I had aortic valve replacement 10 years ago and as a bounus, I got a pacemaker at the same time because the nerves were cut and the chambers would not sync up. After the 6mo waiting period I followed my AME's and FAA's instructions which included stress tests, Holder monitor tests and bloodwork. I got my 3rd class special issuance and renewed it for 10 years until basic med was approved. The 3rd class was only good for one year and required some documentation and a cardiologist letter for renewal. Don't get me wrong, it was not always easy and it seemed that the FAA would change doctors and request new tests, but it was worth it. At this point, the only thing that matters is your health - GET FIXED!
After that follow the FAA protocol, use a good AME or a company that specializes in special issuance, get it, and then transition to basic med.
Good luck!