T Nation

Diagnosed w/ Rapid Heart Rate Condition



Recently, I was diagnosed to have exercise-induced SVT (Supraventricular Tachycardia), which is not a worrying condition, after regularly strenuous aerobic exercise, e.g. cardio interval training. SVT is faster than a normal heart rate, which can be caused by overtraining and caffeine. It can be annoying, scary, despair and alarming.

Doctor advised me that I can continue exercising, and I can take beta blocker whenever I need it after sensing my SVT symptoms, but I think my SVT is quite mild. My beta blocker is nebivolol (NEBILET) which is a newer beta blocker, but appears to be very strong to suppress my heart. I know beta blocker can slow down metabolism, so that I would have to reduce my caloric intake slightly and to increase my training load if it is still tolerant with my SVT.

I expect I will experience an episode of SVT if I frequently work out for my cardio performance. I think my local gym does not give me a plenty of fresh air, so that it can harm me more than good, apart from weight training which would be less harmful to my SVT. If so, walking in nature would be much better, as it would simply be such a safer exercise and gives me a plenty of fresh air, which, I suppose, is very important for lungs function.

I am waiting to see an electrophysiologcal cardiologist for exercise stress test, at the moment.

I wonder if anyone here have had experienced SVT or any rapid heart rate conditions and beta blocker?


I haven't gone to a Doctor to see if I have a condition but my resting heart rate is like 120 bpm, and i've had it go as high as 200 during endurance cardio, perhaps I should see a Doctor... lol


You would need to go to see a doctor if you experience any actual symptoms, e.g. chest pain, breathing difficulty, palpitations and dizzy spells. That resting heart rate is no good, but maybe it is anxiety. I suppose that every doctor would not agree with your abnormally resting heart rate.



Doctor diagnosed me with exercise-induced supraventricular tachycardia (SVT). It is a rapid heart rate disorder, but is not a worrying condition. She said I can continue exercise. I am advised to take nebivolol (newer and safer beta blocker). I expect I will wear on holter monitor and do stress exercise test in October and December, respectively. Then, I will see an electrophysiological cardiologist.

After that, I think radiofrequency ablation may be considered for my SVT, or, otherwise, perhaps I can continue taking nebivolol. I do not know if it is worth to get radiofrequency ablation for me, because I heard that it can lead to potential complications and risks sometimes.

SVT is alarmingly but can be really scary if you think you are going to die. Nevertheless, it is not a life-threatening condition. It is said that many people who work out often will have episodes of SVT. I find it tough to deal with SVT when my workout tend to reach to higher level of intensity.


I had SVT as a child/teen. I took digoxin to try to control it from the time I first started having "episodes" (usually triggered by intense physical activity, adrenaline rushes - the roller coaster, for example) at age eleven until I was fifteen. It was really irritating because the medication wasn't very effective (though perhaps I'd have had more issues without it) and I usually had to ride it out. It was always such a relief when it ended, feeling my heart slow to a regular thump in my chest.

Anyway, I had a spinal fusion for scoliosis when I was fourteen, so I had to wait to do anything with my heart. A year later, I did have radiofrequency ablation done. The first time was not entirely successful so I went back again. I have not had an episode since; I am almost twenty-six. It was a gigantic relief to not have to worry about it anymore, or to have to take medication. When the doc gave me a choice of either upping my medication or referring me to a specialist for pediatric RFA, it was an easy decision.

I do occasionally feel that odd feeling I would get when I was about to have an episode - a bit of a twinge in the heart, if you will...but then nothing happens, everything continues beating normally as it should. I am very glad I had it done. I was not a lifter when I was a young teen, but I did competitive dance and varsity golf - it was a pain dealing with episodes in those situations.


Yeah, SVT episodes are clearly usually triggered by intense physical activity. I fairly agree what you said that the medication wasn't very effective. I suppose that my medication, nebivolol, cannot be good enough to control my heart while I lift weight for more than two or three sets. However, it is steadily improving to control my heart while I do moderate cardio workout. Maybe radiofrequency would be for me, because it can take my worries away.


I know that RFA is not indicated for every case of SVT, but if it is an option and your doctor thinks it has a good chance...look into the risks and consider it. Mine was just so unpredictable, and it was happening frequently enough that I just didn't want to deal with it. I had the procedure done in the morning, spent one night in the hospital (not allowed to get up from bed for about 24 hours), and then went home the next day.


I have been getting few SVT attacks since June. I will wait to see and find out if I need RFA, when I see an electrophysiological cardiologist.


I’m 60 years old and Was diagnosed with exercise-induced SVT a few months ago. My only symptoms were a rapid heart rate at the end of an intense workout, up to maybe 165 bpm. It was not very disruptive and I could continue exercising without a problem. Based on some other simultaneous tests, I found out that I was fairly dehydrated and which caused a magnesium deficiency, which can also be a factor that triggers SVT. The cardiologist talked about ablation but I thought that I would try to manage it myself with increased electrolytes several hours before a workout, and a magnesium supplements daily in the morning. I also now drink a lot more water during the day than I did before. All of this has been a very effective way for me to manage my SVT. I do get episodes if I have a significant amount of alcohol the night before and then exercise, It is more prone to trigger an event at the end of the workout but definitely not every time. The events are pretty brief usually 10 minutes or less. The alcohol I guess dehydrates me and so maybe I’m not getting enough fluids or electrolytes the next day prior to the work out. Before you go the ablation route, you might try this approach.


you probably have tachycardia also I had same thing it was caused by anemia do to internal bleeding my pulse actually it 300 at one point for about 2 minutes we got it down doctor wanted me to go to the ER I refuse just got out of the hospital is back in the hospital the next day after I found out my hemoglobin count what’s 7.1when your resting heart rate is high it increases the size of your heart , I would get that checked out resting pulse of 120 it’s very unhealthy I got my heart rate up to 2:20 when I was 17 years old but when you get older you can’t tolerate the high levels as much, you could be strong as s*** it’s still be anemic