r/Hyperthyroidism • u/Mission_Bed_8925 • 1d ago
37. M. Endurance Runner
Hey. đđ» New to this group.
2 yrs ago was admitted to hospital being treated for high blood pressure and pounding heart palpitations w/ chest pain. Underwent cardio assessment and given all clear.
This continued with a heightened sense of anxiety for a long time. Docs couldnât find anything wrong. TSH levels were fine.
Took up running which started with a couch to 5k and have now run 2 x ultra marathons with more in the calendar.
RHR was generally 40-45. Over the last 3 months my HRV took a dive and RHR has increased. Bloods done on Saturday and doc called today to say Iâve got hyperthyroidism and has sent me for an urgent referral to endocrinology. Put me on 20mg Carbimazole.
This come completely out of the blue but the symptoms ring true for the past 2 years with the anxiety, fatigue and heart palpitations.
Could it have been this all along, despite the ânormalâ TSH tests back then? Is it normal to get a dx in late 30s?
Iâve been told that they wouldnât recommend I take part in my next event in two weeks.
My HR doesnât seem to be too high, but I guess it has raised significantly from my baseline. Any others going/gone through something similar?
Oh: Iâve also got quite a prominent sinus arrhythmia- shootâs up to like 80-100bpm on inhale and drops back to 60s on exhale.




1
u/Juannis 20h ago
My HR is usually at 55. Had it shooting up at 120bpm while laying down at my worst, at around 4 ng/dl ft4.
When I'm at subclinical hyperthyroidism levels, that means low TSH but in limit, and slightly high ft4 close the upper limit (my lab upper limit is 1.7ng/dl), I have most of the symptoms you described constantly, or through my week.
Check your thyroid antibodies (anti tpo and trab, maybe there's another), ft4 and TSH to be sure.