Supraventricular Tachycardia (PSVT) and Running

@fritz3rd Hi and Welcome to connect. I see you joined last year but this looks like your first post. Thanks for sharing your experiences as we are a community of patients and Caregivers try to help others with our experiences.
I'm actually impressed you still are able to do marathons. I don't have SVT but prior to my Heart Transplant had pretty severe VT. The Transplant came due to my pacemaker and medications not longer able to help with my arrhythmias. So your an inspiration to all of us as to what is possible even with a heart condition.
Have a Blessed Day

My episodes are short - around a minute and happen occasionally while running. I should have added "Paroxysmal" to diagnosis (PSVT), meaning from time to time. They stop when I stop running. Only other times I've had (detected) episodes is on brisk walks and that's rare. I never discussed a trigger point with doctor, as when I've seen it happen (on my Apple Watch) I break into a walk and it goes away. Always has. Yes, a stress test was part of the cardiologist's tests and it triggered episodes. My concern is, if I continue to run the problem could get worst, so don't want to have that happen.
Thanks for your thoughts.

I have had a very similar experience over several years...the SVT episodes have gotten more frequent over those years. I am a 74-year old man who has completed 74 marathons. My best time was 3.25 hours 30 years ago. My times were going down just like most articles say...about 5 minutes per mile per year. I first had issues with heart problems about 25 years ago, had many tests, treadmill, heart monitoring. radioactive stuff, MRIs, etc. I was told my heart was great...don't worry. Then perhaps 4 years ago, the events started to happen quite more often and more severe. I really pushed the doctors and finally ended up with a heart monitor taped for two weeks to my chest. I was instructed to push a button on the monitor whenever I felt the condition. By this time, I could tell when the condition was starting. Usually, when it starts, I can stop, walk, or otherwise slow until it passes. Most time it goes away quite quickly, within a few seconds. But...sometimes my BPM can stay elevated for up to 10-15 minutes. Anyhow, following the heart monitor test and pushing the cardiologist, I was diagnosed with SVT. This only happens when running, and oddly, mostly when I either slow, stop for a traffic light or water fountain or begin a downhill.
In any case, it's scary and at the least very annoying. I have continued to run races, but my times are nothing of which to be proud. I've just started to train for the winter marathons here in Southern California; it's a pain in the rear end to work around this condition.

I was told after my first ablation, that the heart swells a little while it’s being worked on and tiny pinhead-size areas could be missed. That could bring back the arrhythmia at a later time. I was playing town ball (1860’s baseball), hit a double, and the SVT’s came back. The second ablation was done a few weeks later.

I just asked my doctor if I could take the next step for me, that being ablation. I had read somewhere it was 80-90% successful. But based on your experience and that of a friend of mine (he had 3) I'm not so sure.

What is the difference between tachacardia and afib?

I am not a runner, but 16 years ago I had SVT, 205 bpm. It was determined that my resting heart rate was too low for drugs. I had an ablation. Three months later the SVT came back (the electrophysiologist has said there was that chance). I had a second ablation. Since then I’ve had PVC’s from time to time. Last May I almost passed out at work from a short fast arrhythmia. My cardiologist thought it might be ventricular tachycardia. In June I had a LINQ loop recorder implanted.