Had chest pain for 2 years which was severe and then I was diagnosed with hypothyroidism TSH level was 388 and now it has decreased to 78. so now it's treatment is going on for past 4 months. Now I am on (Euthyrox 150) for past 1 month still having chest pain which becomes severe sometimes. Also sometimes heart rate also increases. So is it something related to heart disease? Plz do reply