Heart problems from overdose?

[chel 81]

So for over a year my doctors overdosed me on thyroid meds because they were too stupid to test me for mono saying it was so rare to get it again. I finally convinced my doctor to test me for mono and sure enough I had reactivated EBV. It was actually the EBV that was causing all my hypothyroid symptoms to flare up. So, in the mean time I began dropping my thyroid meds back to my original dosage but over the course of being on that high dose I got many adverse symptoms such as high BP, high resting heart rate, pounding heart (I could feel my heart beating very hard much more than normal- not just fast but hard), breathing difficulty, and skipped heart beats. I knew something more was going on because of my bad reaction to the increase in thyroid meds but I still remained hypothyroid with the other symptoms so we kept trying until I finally convinced them to run the EBV tests. So, 6 months later I'm almost at my original thyroid dose but am still having lingering effects of too much thyroid like occasional skipped heart beats, pounding heart beat, sometimes fast heart beat. I'm wondering if I will have lasting effects from too much thyroid hormone or if maybe it's just going to take a while to get my heart back to normal? I was a runner before getting sick and am fearful that I could have permanent heart issues from being overdosed for so long.
Chel

[Smilerdeb]

put your mind at ease and ask for an ultrasound of the heart.
This measures the blood flow, the valves and functions and picks up any abnormalities caused by thyroid illness.
I have a heart that does as it pleases (lol) but thats from a heart murmur at birth.
I think when I had RAI and the hyperthyroidism finally subsided, it felt strange NOT to have a heart beating hard like a pulse in my head.
At one stage I even told the Doctor I felt strange when my heart rate was lower than 100.
Ive got used to it now although the murmur still causes the ocassional flutter and missed beat.
I get yearly checks as I have mitral valve regurgitation (trivial).
The thyroid issues couldve caused it but then again, they tell me so too could the heart murmur.
I 'm just happy I'm breathing :)

[Barb135]

Before I was dx'd hypo, my heart rate was extremely slow - in doctor's office late one day and even after a full day at work, then being agitated for having had to sit there for 2+ hours, my heart rate was still only @ 48.  Everyone freaked out and next thing I knew I was in different room and they were wheeling in the EKG machine, which basically only confirmed that my heart rate was low.  A week later they put in a holter monitor for 24 hrs - which again confirmed my low heart rate.  

About a week after THAT, I was dx'd hypo, which is what was causing my heart rate to be so low.  Dr didn't feel that there was anything wrong with my heart but sent me to a cardiologist anyway.  The cardiologist in turn wanted to do a stress test and echocardiogram, which we did and both were fine except for a leaky valve.  

Anyway, just between the time I had the echocardiogram and when I went to the doctor to get the results, I had woke up in the middle of the night one night and I felt like my heart was beating right out of my chest.  It felt like it was going SO fast and SO hard, but when I checked my pulse, it was only about 64.  I mentioned these things to the cardio when I saw him, but he didn't think it was anything significant.  I've also mentioned them to my pcp AND endo and neither of them seem to think anything of it either.  It doesn't always feel so fast now, but it DOES feel like it's beating really hard.  

I've wondered if it feels like this because I had gotten so used to the low heart rate and now that it's more normal, it just feels funny.  This has been going on for several months now, so I would think I should be getting used to it eventually........  

[Smilerdeb]

Maybe the T4 med has something to do with it?
I know when I first started on T4, my heart rate would be strange....one minute fast and the next slow.
Sometimes when I am a fraction Hypo, my heart rate drops ......
Usually the first sign of my levels being low is a slow pulse.
That and the ache in the left leg was the first sign of hypo and I would know it off by heart now.
Since levelling out and my levels normal, my heartrate is around 80 but at nights can sometimes be a bit faster.
It does feel weird to have a different heartrate now when I was used to having one in the 120-160 mark.
Thats a horrible sensation.....
I still get the odd flutter of a fast heartrate but that is the murmur and leaking valve where the heart isnt getting as much oxygen as it should.
Its just a normal reaction to the conditions and subsides within minutes.

yes it does take a while to get used to the 'new ' heartrate.