I recommend high" iodine; as we are flooded with fluoride, bromide these days. That is definitely not natural", so (as we always did at this forum) take at least so much that you can combat this. This is what we have recommended all this years; you Vulcanel (with all your alias) included.
Ps palpitations and arhythmia does happen both with hypo (me a few years back) and hyper thyroid (not me:)
I recommend newcomers to search this forum, but also to turn a blind eye towards the conflict between two moderators that should know better than to bring it onto this forum. You live less than half an hour apart. Do it like proper men; eye to eye. Talk that is:)