Originally Posted by Nan Cyclist

This has been a strange time and I do not know how all the pieces of information fit together.

Christmas was particularly stressful as all of us got the flu and lost a tremendous amount of body fluids. But we got through it. Although I drank a lot of liquids, perhaps I was not rehydrated enough. On the 27th I felt fine so I decided to do my regular bicycling workout wearing my heart rate monitor. About halfway into it my heart rate spiked to over 205. It did this four times. I got off the bike and went up two flights of stairs to get to pulse ox monitor. By the time I got there my heart rate was down to 175. It continued to go down and returned to normal. The following Monday I went to see my doctor and had an EKG which was normal, was fitted with the ZIO patch, which is monitoring my heart beats for the next two weeks, and gave the obligatory vial of blood for testing. The doctor called late in the evening of the 30th, never good sign when the doctor calls at night, to tell me that I have hypothyroidism, low thyroid and I need to start on medicine immediately. So now I'm taking levothyroxine to try to get my thyroid back in shape. I'm sure it will take my body a couple of weeks at least to adjust to the new medicine and within a couple of weeks I should have results from the heart rate monitor. How these all fit together, I don't have a clue. But if it had not been for the rapid heart rate that was recorded on the heart rate monitor, I would not have known I have hypothyroidism and that would not have been a good thing. The beat goes on.