I am finding that every now and then, usually between 10am and 1.30pm, I have episodes when my heart rate slows to the low 50s. My breathing tends to get light and I struggle not to fall asleep. This is pretty embarrasing when I am in a meeting at work. These episodes last maybe half an hour. My blood oxygen levels become low too, a fact I only realised when playing around with a friend's pulse oximeter and set the alarm off. I am pretty sure I am not under-medicated because my TSH is very low and although my FT4 and FT3 are in range (towards the top of the range) my doctor would really like me to lower my dose, something I am resisting because I need to be able to function properly at work.
I take Vitamin D and B12, which I find helpful. I am changing GP soon and moving house, so will try to get my vitamins checked when I have a GP organised.
I was wondering whether anyone else gets these episodes, and whether I can do anything about them. At the moment the one thing that helps is forcing myself to breathe more often, but it's an uphill struggle. The first time I noticed this happening I had an ECG which was normal.