This may have been mentioned before but I am unaware of it. I saw the following info on the Thyroid UK community site here on HealthUnlocked.
"Now experiencing atrial fibrillation after being 16 months without problems. I'm a cardio patient, had Amiodarone-induced hypothyroidism but was taken off that drug a year ago. My TSH went first one way and then the other and levothyroxine was reduced to 75 mg 5 months ago. Had a blood test yesterday and awaiting result but has anyone experienced problems when coming off Amiodarone?"
Yes, amiodarone can definitely affect your thyroid function, see
Your GP should be testing your thyroid function at least every 6 months.
Make sure he asks for all of these tests.
"I had both Atrial Fibrillation and Atrial Flutter before I was diagnosed with Constrictive Pericarditis.
My Cardiologist treated the two disorders separately although I am almost sure the heart condition which was very serious caused the AF. I was put on Amiodarone as nothing else kept my heart rate down.
Then in between times I had three cardio versions and three ablations but was told that these would only help the flutter. The third ablation seemed to do the trick but having a Pericardectomy definately stopped the AF.
I was then taken off the Amiodarone as I no longer needed it.
I did carry on having Atrial Flutter afterwards and then about 18 months after my surgery I developed Graves disease, the Atrial Flutter only stopping when I was put on Carbimazole. I can only put developing Graves down to being on Amiodarone, even though the Endo's disagree. No one in my family that I know of, has any kind of thyroid problem and even if I was borderline before (without knowing it) it could only have been the stress of open heart surgery and/or Amiodarone treatment seeing as it contains a very high amount of iodine."