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Persistent sinus tachycardia

To Whom It May Concern-

I am having persistent sinus tachycardia and have been through 2 event monitors and 3 heart Holters. The rhythm on the last event monitor (3 weeks) showed persitent tachycardia w/some PACs. My doctor is now recommending an EP specialist based off of the results.

I currently take 50mg of Toprol XL at night, which doesn't appear to slow things down. The main issue I am having is persistent sweating/exhaustion with minimal exercise or activity. My echocardiogram is fine and nothing else has surfaced.

My heart rate during the day ranges from 100-140 bpm.

I am very concerned about the cold sweat issue with minimal exertion. There is a tentative thought it could be a variant of POTS syndrome, but no real answers.

Can anyone shed some light on the above or experience something similar?

Thank you for your time.
4 Responses
612551 tn?1450025775
Your post is new so I'm sure you'll get some inputs from others with similar heart rhythm issues... but in the meantime I offer:

A resting HR of 100 is at the edge of tachycardia and may just be lived with, a HR approaching 140 (and more) needs to be lowered.  The classical treatment being beta blockers and calcium channel blockers which each have the associated side-effects.  I take both to control my atrial fibrillation driven HR and that keeps my resting HR in the 80s.  

Of course, when you are up and around a HR over 100 is normal and if climbing a hill/stairs or fast walking/jogging the HR may well go over 140 and be just fine - depends on your age.
1423357 tn?1511089042
50mg of Metoprolol is rather low.  You still have a lot of range to work within.  As a comparison, I'm currently on 75mg. following my ablation for SVT, and that's just to keep my blood pressure nice.  I was on 100mg for my SVT, and was as high as 200mg when we were experimenting with dosages.  I'd talk to your physician about bumping it up a bit.

Also, Toprol XL (metoprolol succinate) is a timed release version of metoprolol.  If you are good about taking medications, Metoprolol Tartrate is perhaps a quarter of the cost of the Toprolol XL, except you have to take it twice a day.  I take mine every 12 hours, at dinner and upon rising; 5 and 5 is easy to remember.
1423357 tn?1511089042
I hasten to add that body mass will play a boig part on your dose.  If you're a big guy (50mg) may be like taking a Tic-Tac.  If you're a little female, a shade of 100lbs., that same dose may lay you out flat.
612551 tn?1450025775
I am a big guy  (240 pounds or worse : (  )  and 50 mg  (25 every 12 hours to reduce cost) is about as much as I can tolerate.  I think I was on 100 (I was taking the slow release at that time) was what I was taking when my doctor added a calcium channel blocker and lowered by BB to 50 mg.  I am planing to talk with my Cardiologist on my 6 mo check-up about cutting my BB and CC dose in half to see if it helps reduce the fatigue I feel (if it is just my age, then there BB and CCB have little to do with it).  I take those durgs simply to control my HR, and I can monitor that myself and go back to the higher dose if the HR starts to climb too much.  That's what I plan to suggest.  Some people have a low tolerance to the side effects.  For me I would believe less is better when it comes to medication, so even if my fatigue doesn't change, I'd be ahead if I can trim back on my dose levels. I've been on this stuff for a long time and worry some about he long term affects.

Sorry if I have drifted off-topic, but I share the above BB experience just as one sample/example.
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