What I read from the report is:
-There are no serious blockages found in your coronary arteries
-Your stent is doing its work perfectly
-There is some stenosis found proximal to your stent, but it is not a significant stenosis.
The mild stenosis, proximal to the stent, can be from before stent placement in 2012 or have formed in the last 4 years. It might be interesting to compare it to the situation that was found in 2012.
Since it is only mild, I would not very worry about it.
Thanks for your valuable analysis. can stenosis and calcification in arteries be reversible .
BTW thank you once again.
Although a few people think otherwise, the normal answer is "no".
In the 1980 years there was a cardiologist (Ornish) who claimed that with a special diet, stenoses could be reversed, but afaik this is not taken very seriously by modern cardiologists.
The only thing you can do is try to avoid that the stenoses progresses by living a healthy life.
Thanks once again for your invaluable information.