I was diagnosed with hashimotos disease about 6 months ago and put on .025mg of synthroid. After a few months, I started to notice my heart flutter. It eventually turned into a feeling that I experienced everyday...several times a day. I had all the work up done by a cardiologist and nothing showed up. My GP finally reduced my synthroid to half a pill. When my numbers were checked a month later my TSH went up to 35!!! But, my flutters went away. My synthroid was increased again to .025mg and guess what is comming back...MY FLUTTERS!! I want to know if there is anyone out there who is having or has had the same expierience. I feel like no one that I know can relate and it scares me.