Hyperthyroidism is a well known cause of Atrial Fibrillation.
Too much Synthroid causes hyperthyroidism.
Yes, I have experienced it from overmedication, I think. My heart knows more moves than a cheerleading squad. What the technical names are, I lose track of. Skipped beats, flip-flops, tachacardia, mitrial valve prolapse, The Pyramid, you name it. LOL!
If you Google Atrial Fibrillation thyroid you will find it can be caused by overmedication.
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