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If you only have PVCs (benign) and short runs of SVT there is no reason not to exercise.
The fact is that if the SVT occurs and persists for more than ten or fifteen minutes then you need to get to the ER to get it stopped, but at your age this is more of an inconvenience than a danger.
If the SVT becomes a recurrent problems you will need a cardiologist to determine if you can have a procedure called an 'ablation' (not surgery, done by catheterization of the heart) to fix this permanently.
But, for now, there is no reason not to increase your exercise and fitness level. Touching base with your cardiologist would, of course, be beneficial.
The propranolol should be protective so please do take it.
Also, if you have not had your thyroid function checked this would be prudent, as overactive thyroid can cause tachycardia (fast heart rate) and this would be an important thing to rule-out in your evaluation.
If you have questions about my answer please type them below and click 'reply'. Positive feedback always appreciated.
nothing you are telling me indicates that there is any reason for you not to exercise. I think you should. If you have a recurrence of the SVT that requires treatment then I would seriously consider the ablation and put the thing behind you. But for now, be reassured, there is nothing dangerous about exercise in your case.
Thanks so much! I appreciate it. Do you think weight loss can "help" svt? I dont think I've had a spell in a couple years, will it come back? can it just happen during stress? or get worse?
No way to know. Stress/anxiety can certainly cause a rapid heart rate, but if you truly have SVT and it recurs then weight loss will not help. Medicine or an ablation are the treatment. It occurs because the conduction system in your heart has an 'extra pathway' that, under certain circumstances, can cause the heart to stay in a rapid rate.
HERE IS A GOOD LINK.
Weight loss and exercise though, WILL help your anxiety.