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Old 02-04-2005, 11:59 AM   #1
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Can low T3 cause Slow Heart Rate?

I am a 28 y/o female who went hypo after RAI to treat Graves disease in Nov. of 2002. My Blood Pressure has gradually increased since that time and I've had intermitten problems with anxiety/panic. Currently I am on 200mcg of Levoxyl & 5mcg of Cytomel. My PCP recently prescribed me BP meds. I decided to get a 2nd opinion. I saw a new doc last week & she wanted to give me a month to make lifestyle changes before starting me on meds. Well, the great news is I quit smoking & started exercising (this was all on tuesday of this week). Amazingly, my Blood Pressure has already dropped from an average of 140/92 to an average of 122/80. However, my heart rate also slowed from an average of 85-89 bpm to an average of 56-65 bmp.

I recently had new thyroid labs drawn WITHOUT the cytomel in my system (my old PCP refused to test me w/ the Cytomel). My results came back with my TSH low @ .3 (.4-5.5), my Free T4 was normal at 1.2 (.8-1.8) and my Free T3 low @ 218 (230-420).

I've resumed taking my 5mcg of Cytomel daily. Do you think my slow heart rate could be because of the low T3? If I were to try Armour or take 10mcg of T3 do you think that would help my heart rate, or am I just worrying over nothing?

 
Old 02-04-2005, 03:44 PM   #2
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Re: Can low T3 cause Slow Heart Rate?

I don't know whether T3 would slow the heart, but I do know that certain BP meds do. Hubby takes a beta blocker, and his HR is often only in the 40s.

 
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Old 02-04-2005, 04:19 PM   #3
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Re: Can low T3 cause Slow Heart Rate?

Is that your resting heart rate? Typically the resting heart rate is 60-80 bpm so your heart rate really isn't that bad. I wouldn't worry about it too much unless it stays low.
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Old 02-04-2005, 06:04 PM   #4
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Re: Can low T3 cause Slow Heart Rate?

Zekat:

In my humble opinion, your frees could use a boost. Armour is good option and might do the trick. I would postpone introducing any heart meds, until you have finished messing with your t-protocol. To change over, you best bet is to lower the levoxyl, and add in some Armour gradually over time -- Not cold turkey. That would be bad...and would put your body through hell.

I would test frequently, and tweak a little every few weeks or so.

I wouldn't pay to much attention to the TSH as much now. It doesn't carry the same relevance it would if you still had a t-gland and no meds.

Good luck!

~S

 
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