are you still there?
Well, I do not see that you are on right now, but I think that you have encountered some of the difficulties of medicine- i.e. more of an art form :-)
We try to make decisions based on science, and for the most part it does help our decision making
but in some patients, who have responded quite well to a previous therapy- changing it does not make it for the better
THe concern with your thyroid is that amiodarone can cause hypothyroidism in some patients (and in others, hyperthyroidism)
Both of these are treatable conditions.
You can read about it here: here is an elegant excerpt:
At any rate, if your thyroid issues are NOT causing you problems (only the hyperthyroidism one is tricky to treat and is more common in iodine lacking areas- which is not the UK) then you don't need to change the medication if it is working for you
Which it is
So, I would not change your medication and would consult with your old cardiologist
I hope that this helped.
Please leave positive feedback if it did :-)