<s>[INST] I have been diagnosed with Graves disease and am on medication for my heart rate and for my thyroid.  I have been experiencing rapid heart rate heavy chest problems breathing and it feels like my heart is beating really fast and then kinda stops for a couple of beats then starts with the rapid beating again [/INST] Hello I am Chat Doctor. You have Graves disease which is an immune thyroid disorder which produces an excess of thyroid hormone. Thyroid hormones affect the body systems and cause various signs and symptoms and one of them is rapid heart rate as your have mentioned. I would suggest that you see a local doctor if you have irregular heart rate and do an ECG.Typically, you must receive medicines for thyroid disease and for your rapid heart rate and if that doesn't help then you must get reassessed for further advanced invasive methods if necessary. I hope that helps resolve your query. </s>