Author Topic: Atrial Fibrillation and Heart Rate Monitoring Help?  (Read 1542 times)

Re: Atrial Fibrillation and Heart Rate Monitoring Help?
« Reply #25 on: August 29, 2019, 04:36:50 pm »

Does anyone know if AF is hereditary?

J

I was told by my cardiologist that AF is not hereditary but that it does run in families (my mother, one of her two sisters and one of her three brothers all had / have AF as do I, though neither of my two siblings have it). I think I know what he meant, but if one of the YACF medics cares to elaborate that would be great.
hereditary means that it is directly inherited in traditional terms or what is known as mendelian inheritance.  Runs in families means that we think that it may have some sort of genetic basis but it is patchy and unclear but probably occurs more commonly in families than chance alone.

The big thing at the moment is called Genome Wide Assessment studies (GWAS) which is picking up all sorts of interesting things. https://www.biorxiv.org/content/10.1101/242149v1

Re: Atrial Fibrillation and Heart Rate Monitoring Help?
« Reply #26 on: August 29, 2019, 05:03:38 pm »
 :thumbsup:
R10000 x 2   RRtY x 7    SR x 7    E = 128

Re: Atrial Fibrillation and Heart Rate Monitoring Help?
« Reply #27 on: August 29, 2019, 06:00:37 pm »
Thank you all, once again.  I am certainly being cautious!  I used the bike to go to the library today, without any problems - but then I never had a problem till I had a problem - and I've never had one since!  So, I'm being careful and trying to stay cheerful.

I am not reading anything into the home BP readings any more, except confusion.  They are now up around the 80 mark, which is closer to readings I got in hospital.  I guess it's very difficult to be sure when the heart is fluctuating as much as mine does!

@Pluck  I haven't got any Mk1 fingers because of arthrirtis, but the Mk3s indicate (as I have always known) a pretty variable rate, with missed beats.  I also don't appear to have the strongest pulse in the world - but it's got me round a few old rides!

Thank you all again - you are very helpful to someone who has been knocked sideways by all this!

Peter

Re: Atrial Fibrillation and Heart Rate Monitoring Help?
« Reply #28 on: August 29, 2019, 09:49:48 pm »
I know I need to discuss this properly with my own doctors, but I'm interested in general terms in the interaction between drugs used to treat these conditions, and cycling. For example, bisoprolols are used to reduce heart rate, but is that what you want when climbing a steep hill? (Or do you have to be more prepared to get off and walk?) I think my racing days are long past, so I won't be pushing it that much...

Re: Atrial Fibrillation and Heart Rate Monitoring Help?
« Reply #29 on: August 30, 2019, 07:30:31 am »
No. But if you have heart failure or angina then beta lockers act as a lock on the heart rate and prevent your brain from going high enough to cause problems.

In AF they will increase the cardiac filling by giving more time between each beat for the ventricle to fill and thus improve heart function.

T42

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Re: Atrial Fibrillation and Heart Rate Monitoring Help?
« Reply #30 on: August 30, 2019, 08:10:30 am »
WRT climbing, I did quite a lot 2008-2011 when I was on bisoprolol. Every so often I had to stop pedalling for a second or two to let the burning pain in my quads die down. I still managed rides with 1500 metres of climbing, though.  I was on 25 mg/day.

In AF they will increase the cardiac filling by giving more time between each beat for the ventricle to fill and thus improve heart function.

A couple of days ago I began to think that something of the sort was what was happening with me, since my performance has actually deteriorated since I came of the BBs, and it now takes me a ridiculously long time to recover from rides I did easily three months ago.  I'm now awaiting the results of a pro-BNP test to see if indeed I'm going down the rabbit-hole.  Should find out this morning.

This feels more and more like wriggling on the hook.
I've dusted all those old bottles and set them up straight.

Re: Atrial Fibrillation and Heart Rate Monitoring Help?
« Reply #31 on: August 30, 2019, 09:33:12 am »
 :(

Thanks. In my case, as I mentioned above, I'm recovering from a bypass. I'm currently not allowed to cycle until the surgeons confirm that my rib-cage has mended, but otherwise feeling relatively fit and walking (which I am encouraged to do) as much as I can (did manage forty miles in a week at one point).

I'm hoping to return to Audax riding (although I've never gone beyond 200km) in the autumn, and hence the questions.

Re: Atrial Fibrillation and Heart Rate Monitoring Help?
« Reply #32 on: August 30, 2019, 10:28:33 am »
Good luck to all of you!

T42

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Re: Atrial Fibrillation and Heart Rate Monitoring Help?
« Reply #33 on: August 30, 2019, 10:44:59 am »
I'm hoping to return to Audax riding (although I've never gone beyond 200km) in the autumn, and hence the questions.

More power to you.

Good luck to all of you!

Thanks, Peter.

Good news: following my GP visit, my pro-BNP result shows no heart damage or enlargement, but doesn't have any bearing on A-fib/not-A-fib.  So GP says continue with no tea or coffee :o  :'( and just ride. So...
I've dusted all those old bottles and set them up straight.

Re: Atrial Fibrillation and Heart Rate Monitoring Help?
« Reply #34 on: August 30, 2019, 11:33:02 am »
Take it easy - but take it!  (Woody Guthrie?)  Speaking of which, is there a dose of Dorothy Sayers in you strapline?

T42

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Re: Atrial Fibrillation and Heart Rate Monitoring Help?
« Reply #35 on: August 30, 2019, 04:54:08 pm »
Busman's Holiday.  My first bro-in-law used to call that the greatest line in English literature.

And yeah, I'll be out tomorrow, but only a shortie - it gets hot after 11 am.
I've dusted all those old bottles and set them up straight.

Re: Atrial Fibrillation and Heart Rate Monitoring Help?
« Reply #36 on: August 30, 2019, 05:09:45 pm »
Just as an observation, I happen to know a number of ex- real big hitter cyclists. A significant number of them Are diagnosed with AF, and others have other cardiac conditions.
As a layman, I wonder if having an ability to really suffer has caused damage, or maybe being mega-fit and perhaps not de-training correctly has had an impact?

Re: Atrial Fibrillation and Heart Rate Monitoring Help?
« Reply #37 on: August 30, 2019, 05:28:29 pm »
I think Steve redgrave had to consider this which suggests that cyclists are the same.  As I remember, his heart was so big and strong that he had to continue training after he stopped competing in order to allow his heart muscle to atrophy (shrink) safely.  The risk was that he would end up with less heart muscle but the same size and would therefore have floppy walls and risk clotting in his ventricles.

However this is half remembered and may be wrong

Re: Atrial Fibrillation and Heart Rate Monitoring Help?
« Reply #38 on: August 30, 2019, 07:25:30 pm »
My cardiologist told me that AF was more prevalent amongst endurance athletes precisely because of their enlarged hearts - that the greater volume and surface area of a larger heart provided more and/or larger pathways along / across which the errant signals could travel.
R10000 x 2   RRtY x 7    SR x 7    E = 128

Re: Atrial Fibrillation and Heart Rate Monitoring Help?
« Reply #39 on: August 30, 2019, 07:30:42 pm »
I have a copy of this book, which is an interesting read if you want to see what the research is saying. Opinionated but interesting information nevertheless.

https://www.velopress.com/books/the-haywire-heart/

Re: Atrial Fibrillation and Heart Rate Monitoring Help?
« Reply #40 on: August 30, 2019, 08:32:28 pm »
How useful is it for those of us who are definitely not master athletes, and have never been in any danger of over-training (indeed, may never train at all), but do want to do more than the average member of the public? Serious question, since you've read it.

T42

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Re: Atrial Fibrillation and Heart Rate Monitoring Help?
« Reply #41 on: August 31, 2019, 04:40:42 pm »
This looks interesting too:

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4311486/

Have only skimmed it so far, since I've been out this morning & helping set the house to rights for visitors this afternoon (it's 32°) and I'm banjaxed.
I've dusted all those old bottles and set them up straight.