Health, hearts and Coreg

By JB. Filed in Cycling, Heart Stuff  |  
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Some time in early 2008 I decided to finally do something about my irregular heartbeat. An appointment with Carle’s cardiology department revealed that I had a worsening condition called cardiomyopathy, which is basically and enlarging and weakening of the heart wall. This was caused, it was surmised, by another condition called atrial fibrilation, which is:

a lack of coordination between the patches of muscle, which means that the whole chamber doesn’t contract at the same time. As a result, less blood is squeezed into the ventricle from the atrium. Because of this, blood can get backed up in the atrium, then into the blood vessel that leads into it, and, with time, even farther back throughout the rest of the body.

So I was prescribed two different medications, Coreg, a drug that helps to keep your heart from beating too rapidly and Lisinopril, a blood pressure medication. At the time the medicine was prescribed I was also pretty heavy, at around 250 pounds, so my cardiologist prescribed a fairly high dosage of 75 mg per day.

Even though my heart condition had nothing to do with my weight, I decided that it was enough of a wakeup call that I should consider doing something about it, so I began to exercise. I began with swimming, then added some cycling and a few months ago when I decided to sign up for the triathlon, I added running, too. So far I’ve been fine when swimming and running, but when cycling I’m typically out for 2-3 hours under sustained efforts, which causes my heart to work for long periods of time. I’ve been getting some chest pains as a result of this. I suspect that it may have something to do with the fact that I’m now, at 195 pounds, over 50 pounds lighter than I was when I began taking the high dosage of Coreg and I probably just don’t need as much to keep my heart in check. A call to my cardiologist’s nurse has helped to confirm this suspicion, and she made an appointment for me to see the department’s nurse practitioner who specializes in electrophysiology.

I have another group ride scheduled tonight. We’ll see how I hold up. I’ll go as long as I can and hopefully will not experience any chest pains. I have noticed that I tend to get them more on Saturday morning, which makes sense since my exercise takes place closer to the time I’ve last taken my Coreg. If I don’t get chest pains tonight, or at least as bad tonight, then I think it might make sense for me to back off the dosage. I really hope so, because I’d love to eventually be free of any prescription meds.

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2 Comments

  1. Comment by Kyle:

    I just ran across your blog while doing a search on cycling and Coreg. Due to a low ef of my heart, my cardio guy is putting me on a low dosage of Coreg. I am a avid cyclist (riding and racing over 25 years) and am concerned about the medications effects mixed with hard riding. Just scanning your blog, it evident that you are more than just a weekend warrior. Any information you can pass on through your experiences with Coreg would be great. I noticed you where mention chest pain. Was that happening before the Coreg or after?
    Thanks Kyle
    If you decided to pass on any information, you can use emial I was required to leave to reply or if you don’t have access to it, here is one of my other less used emails. khclinton@gmail.com

  2. Comment by JB:

    Hi Kyle. I also had a low EF, which is why my electrophysiologist put me on Coreg. I think I was down around 21% when I first recognized my problem, but Coreg, Lisinopril and an eventual catheter ablation have combined to get my EF up over 50%.

    I’m still on Coreg, but when my doc initially prescribed it to me I was around 270 pounds. He had me taking the maximum dosage of 75mg. I was OK on this dosage until I really started to train for triathlons. Under sustained effort on the bike, especially, I would start having mild chest pains. The pains would usually not start until over an hour into a ride. I asked my doc’s nurse practitioner if we could try to lower the dosage to 50mg per day to see if it would make a difference and it did. No more chest pain. It didn’t appear to have had an impact on my EF, either, as a stress test showed about a week later than it was still around 50%.

    Hope that helps! Feel free to send me mail at jason@barhamnet.net or by replying to comments here. :)

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