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When is bradycardia dangerous? I'm not in good shape but have a lo...
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When is bradycardia dangerous? I'm not in good shape but have a low BPM

Hello I am 22 years old and I have a couple of problems.
First off I am really out shape due to being a couch potato for over year,
not having a job... etc.

I have been having panic attacks for which I take a low dose of betablocker (1,25mg of Nobiten).
The betablocker works great against panic attacks because it blocks the adrenalin.

When I wasn't taking a beta blocker yet, I could sometimes measure a heartrate of around 57bpm when I was laying down.
Since I'm taking this beta-blocker I can measure a heartrate of around 52bpm when laying down.
I figure that when I'm sleeping, my heartrate must definately drop below 50bpm.

A low heartrate can be a sign of physical fitness,
but trust me I'm not ;) I am kind of skinny though, even though I eat a lot.
I guess I must have a quick metabolism.




When exactly is bradycardia (a heartrate below 50bpm) dangerous?
I have asked my GP and cardiologist about this but they were not concerned.

I would like to hear some more opinions though.
Thank you!
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612551_tn?1247839157
If you don't have any problems like dizziness or fainting I'd say there is nothing wrong with your low HR.  I think Bradycardia is defined as a (sustained?) HR below 50.  Even that is not necessarily a problem, if it occurs when you are asleep, you and not physically active, and don't need the oxygen.

Some people have strong (large) cardiovascular systems, and low HR.  These people are likely in a good position to excel as an athlete, especially long distance runner.  But some, you it seems, are not.  I used to run, and wish I had a higher capacity cardio, e.g., low rest HR.

I think the main concern about low HR is a heart stop, arrest.  If you doctor thinks that is a concern consideration of a pacemaker would be in order.  

Again, from what you say, and what I know, I think you should be just fine.
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Avatar_m_tn
I actually meant 47 not 57.
Also "bradycardia" is bpm below 60.
So i made 2 mistakes in my initial post. :/

I'm only beginning to exercise,
& yesterday after exercise i had heartrate of 45...
I don't feel any symptoms though.

This morning it's back to it's usual 55-60 at rest.
So i guess i must be fine.
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Avatar_m_tn
Even though the doctor said low heartrates on Betablocker would not be a problem for me,
I had to stop using them because even in very low doses they would make my heart beat very slow.

Sometimes during the day i felt like i was going to faint and the last day that i took it ended up giving me a very uncomfortable night.
The drug was pushing my heart to a very low HR (49) but i saw my heart kept trying to climb to a higher HR. I did not sleep much that night because my heart felt really weird.
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Avatar_f_tn
what kind of weird? I think I am having the same situation as you here! and I really dont know how to deal with it. It started affecting my daily life.:(
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Avatar_f_tn
would be extremly grateful for an explaination
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Avatar_m_tn
I have 30 bpm and my cardiologist is still not worried. Bradycardia is not dangerous in any way. In fact it is safer than a normal heart. What is dangerous is other stuff.

But if the pulse drops below 30 or 25 somewhere then the back up system, the AV node, kicks in which can cause irregular rhythm. That can be uncomfortable.

But usually it is the sinus node who is the pace maker, with a rhythm of about 60 bpm. If for some reason the sinus wouldn't work the AV kicks in with its 30 bpm. If that to would go bad then there is one more back up system that beats with 15 bpm. But then you will not feel good. It might still keep you alive though.
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