Though I have had PVC's (skipped beats, not racing heart) since I was 22 years old, I think the "current" increase in them is caused by the new dosage of Synthroid I'm on. I went from the lowest, 25 mcg, to 37.5 mcg (cut a 75 in half because they don't make 37.5 mcg).

With this dose, I have a TSH of 2.5, so technically that isn't too much hormone. However, the PVC's increased with this dose. I have experimented with taking a couple days off at a time and the PVC's vanish by the second day. I've done it three times so I'm sure it isn't coincidental.

The doctor said too much thyroid can produce either PVC's or rapid heartbeat, either one. But my level does not show too much hormone. I don't care what he says, I believe the sudden increase in PVC's is due to the higher dose of Synthroid.

I don't know what to do. If I stop the Synthroid, my thyroid function will be abnormal, but I don't want the really bad PVC's, either.

Has anyone ever associated this type of irregular heartbeat with taking thyroid meds?

Hi ,
they do make a 37.5, but you have to switch brands. when I had to increase to that amount i had to switch from synthroid to levothyroxine , to get the right amount,a nd now i rotate, between the two dosage amounts from day to day...if i take the higher dose every day i too get the skipping beats (pvcs)..it's quite normal with hyperthyroidism....and when we take higher doses we're actually bringing that on for a bit...

make sense?

Lisa

I will get my results back 12/21 for hypothyroidism. But, yes I do remember a few years ago when my heart would skip a beat or even two! From what I've read your thyroid can sputter off and on for a number of years even while you are being treated. I believe now that what I was experiencing was hyperthyroidism at the time.

Sorry! I misread your post. I thought you said "without meds". However, my friend who is hyperthryoid said that yes, when her meds are too high she does get skipped heartbeats. This can happen when your thyroid sputters back to health and you happen to be on the same thyroid dosage.

I would call my doctor and let them know. Years ago before I realized I might have thyroid problems, I went to a doctor about skipped heartbeats. He prescribed me some sort of heart medication! Can you believe that! Didn't bother checking my thyroid at all. I don't know what heart medication he gave me because I went home and threw it in the garbage. I never took it because somewhere inside I knew my heart wasn't the problem.

After I was treated with radiocative iodine therapy I was put on Oroxine. I was on 100mg a day, but every know and then my brain tells my body that I'm not producing enoough hormones, even though my results come back normal. As a result I get a rapid heartbeat/palpatations. To solve this problem you have to actualy increase the dosage to 150mg temporarily. And it works. zEvery time I start getting palpatations I up my dose and they go away.

I was diagnosed this last July as being Hyperthyroid. The CNP that saw me at the endo office felt I had Hashimotos.

Well, I started experiencing palps a few months back then the last few weeks of Jan. I was experiencing irregular heart beats that would go on for hours. Scared the poop out of me

I went to my new doctor last week who informed me there is a specific test to see if I have Hashimotos. Never knew that. He also did an EKG on me after he got through listening to my heart and could tell I was experiencing the irreg. heart beats. That came out with normal sinus rhythms.

I told him that I didn't start having these problems till I started the Synthroid and felt that it was causing my problem. At first he wanted me to continue taking my 25mcg dosage but I told him how my irreg. heart beat always appeared after taking the pill. He agreed that I shouldn't take the Synthroid. I was frightened to stop and go back to having all the symptoms I'd been having prior to the Synthroid, but I'd rather have them then the irreg. heart beat. So far, I'm not experiencing any of the symptoms I had prior to the Synthroid but I've only been off it for a week.

Any way, got my results back today. I had a comprehensive metabolic panel (14 different tests), CBC, TSH, T4 and free Thyroixine (which tests for the Hashimotos) all came back great and within normal range.

He's told me not to take the Synthroid and to come back in 6 weeks to re-test my TSH. I haven't had the irreg. heat beats since the day I saw him last week. Just a few palps here and there because I would start getting nervous thinking about what could be wrong with me and last night I had a diet soda and about 15mins afterwards I had a few. I wasn't sure if the caffeine would cause any or not. I guess it can for me.

I'm convinced that the Synthroid was the culprit and am curious to see what my TSH levels will be the end of March. Am I truly Hypothyroid or not. Was my high TSH level last July a fluke thing or what? I'm also curious if I'm really in perimenopause as well. So many questions. This road to turning 50 can sure be a bumpy one

I just started on Armour about a month ago but am having trouble getting the right dosage. Right now I can only take 15mg a day but am still having racing heart, palps, etc. Seems I may be sensitive to it. Not sure what else to take. I had been on Atrium Thryoid 130 for years and didn't bother me. May have to go back to it but I am sure the doc won't like that.