@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