I think it would be interesting to have a look at all of this overt the past 4 years mate, so people reading can make an informed decision on your issues. Plus it will just be a n interesting bit of info.
Kudos to you for posting this thread. I wish you all the best. I believe genetic factors play a major role in our long term heath, the things we do and the lifestyle we lead can aggrivate our genetic destinations. Im sure now you have had the stent put in, you can look forward to many healthy years. My father in law has had them and his life expectancy is much the same as an average person. Personally im sure there are many people out there in their mid 40's who could do with a heart stent(without having used steroids) but will never know until they are a fair bit older, hopefully not being to late.
Good luck dude, train hard and train natural.