Hi congratulations on quitting it will definitely help with the heart problems and yes you would have to be smokefree to get a transplant. I received my transplant 2 years ago January 2018 and the good Lord Help me quit smoking Oct 2011. Mayo did know i was a past smoker and it did not hold up my transplant. Now mine was about 6 years but i smoked 1-2 packs a day. So I'm thinking that if you are smokefree and no chance of starting back up then it shouldn't be an issue. Even tho it was only a couple of years. Good luck and ask any questions you may have.