is a low heart rate cause to be concerned?

[Thyroid_mum]

Hi all,

I’m on 100mcg Levo and 20mcg compounded IR T3 split through out the day and my resting heart rate is 50bpm.

it used to be 55bpm and I’m not sure why it’s dropped. Is this a reason for concern or indication of undermedicated ?

I’ve attached my results from end of January where I posted on here and was advised to increase T4 to 100mcg from 75mcg and my heart rate is lower, which is weird.

Any advice would be appreciated 🙏🏼

[TiggerMe]

I've heard other people say that this happens to them when they are over replaced as well as under replaced... perhaps alternate 100/75 and see how this effects you HR?... your results are at the low end but perhaps that is where you need it to be and a little bit of fine tuning is needed 🤗

[humanbean]

Just for info, the medical name for having a heart rate under 60 beats per minute is Bradycardia. It's never been a problem of mine so I haven't researched it.

en.wikipedia.org/wiki/Brady...

[SlowDragon Administrator]

ALWAYS

T3 ….day before test split T3 as 2 or 3 smaller doses spread through the day, with last dose approximately 8-12 hours before test

Suggest you try reducing T3 by 5mcg and increasing levothyroxine by 25mcg

Ideally you shouldn’t change both at once

So you could try reducing T3 first

[Thyroid_mum in reply to SlowDragon]

Why would I reduce T3? Surely low heart is under medicated?

[SlowDragon Administrator in reply to Thyroid_mum]

Well your Ft4 is low …..perhaps too low

If you increase Levothyroxine further Ft3 might go too high

You could try increasing levothyroxine first

Why are you taking compounded T3 ?

Have you tried Thybon Henning T3

Have you done Dio2 gene test?

[Thyroid_mum in reply to SlowDragon]

Yea, I have DIO 1 and 2 mutated genes so don’t convert well. Did compounded coz I couldn’t handle T3 very well and did and had to build it up really slowly. The T4 level above was on 75mcg T4. I upped to 100mcg and haven’t retreated as it’s not 6 weeks yet. The T3 is split in 3 doses, 10mcg am, 5mcg lunch and 5mcg bedtime.

[SlowDragon Administrator in reply to Thyroid_mum]

I upped to 100mcg and haven’t retreated as it’s not 6 weeks yet.

Oh well….wait and see if levels have improved

[Thyroid_mum in reply to SlowDragon]

6 weeks is next week so I post my results then

[McPammy]

My heart rate lowers when I’m over medicated. It has dropped to as low as 37bpm resting. I was over medicated at that point on levothyroxine. I didn’t know what was happening. I reduced my levo dose and I was fine again. My resting hr is usually around 55-58.

[Thyroid_mum in reply to McPammy]

thanks McPammy, I will retest next week and see where my levels are.