“In some patients, Graves disease represents a part of more extensive autoimmune processes leading to dysfunction of multiple organs (eg, autoimmune polyglandular syndromes). Graves disease is associated with pernicious anemia, vitiligo,
diabetes mellitus type 1, autoimmune adrenal insufficiency, systemic sclerosis, myasthenia gravis, Sjögren syndrome, rheumatoid arthritis, and systemic lupus erythematosus.”
I would strongly recommend you to see a heart specialist to adjust the medications.