By looking at my blood test report on the day of my first afib episode, I notice TSH is 2.692 (range 0.55 - 4.78), FT4 is 1.78 (range 0.89 - 1.70).
I had a blood test just four days before the first afib, in that report TSH is 1.27, FT4 is 1.58.
I had never had any thyroid problem. To my understanding, TSH and FT4 should change oppositely.
Any one has idea about why TSH and FT4 both went up on the day I got the first episode? I asked my PCP, he simply said the test reports from ER are not accurate. I don't believe him.
Written by
li17
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All I can tell you is that many blood tests are inaccurate. Time from draw to analysis can be critical in many tests (INR is one such) and it is not uncommon to find variations in quite short time frames.
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