Heart rate very fast with little movement (170+)?

[IdiotSandwich]

Hi! I wonder if anyone would be able to shed some light on these symptoms I’ve been experiencing-
I were in the hospital about a month ago due to a fainting episode (not sure if it is linked to these symptoms or not). Since, I have noticed I have been experiencing very high heart rates with little exertion.

I’m 19, BMI of 26, female. My resting rate is anywhere from 65-80. Upon standing, this often increases to 110-120. If I stand still this will slowly decrease back down to about 100. If I begin walking, it will continue to increase. Eg- getting dressed / walking to bathroom and brushing my hair, etc will increase up to 140. Last week I walked less than 5 minutes down the road and reached 176. I don’t get out of breath with these numbers, and they decrease back down very quickly once im at rest again. I do find myself unwilling taking quite deep breaths every so often (almost like you do when you sigh?), palpitations quite often(especially when I first stand up or stand still after walking for a bit), nausea(especially in the morning), sweating.
I don’t have any appointments for this for another couple of months, and am curious if anyone has had a similar issue? Thanks :)

[Jenn1302]

Go to the ER and get your thyroid and heart rate checked out. I have Hashimoto's and I experienced similar symptoms when it first started and my thyroid was often swinging between hyperthyroid and normal. Graves Disease can cause this too. You want to make sure they check your FT3, FT4 and TSH, not just the TSH. You should probably ask them to check if your dehydrated too. Dehydration can also cause the symptoms you describe.

You also may want to ask your PCP to refer you to a cardiologist (just to make sure your heart is healthy and structurally normal) and check your thyroid antibodies (TPO, TG and TSI), even if your thyroid hormones are completely normal. Thyroid antibodies often make your thyroid hormones swing from hyper to normal back to hyper and back to normal and this causes strange symptoms (also, in range, doesn't necessarily mean normal and symptom-free when it comes to thyroid). Blood tests often don't catch that. It often takes years or even decades until your thyroid hormones actually go out of range.

You mentioned that you feel nauseous in the morning. This is often caused by GERD or gastritis (a GI can diagnose this). Gastric issues can cause palpitations and arrhythmias by irritating the vagus nerve in your stomach. This condition is called Roemheld Syndrome.  

Feel free to PM me. I know how frustrating these symptoms can be.

[Jaizasage18]

Hello, I have not had significant increase in HR upon standing put have had issued with palpitations. I have colleagues and friends who have POTs and they display the same symptoms you have described. Im sure your cardiologist will rule POTs out and give you an ECG and a holter monitor, blood work, and an echo.

Stay calm. When my heart beats fast I lay down and use ice and place it on my check and my cheekbones, it calms me down and helps to decrease my HR. Research the mammalian effect.
Hope this helps.