Over the 54 years that I had SVT, it was caught only 3 times, when I was first diagnosed as a child of 6, then at 21 during a cardiac
catheterization. I had the kind that would run nn and on for hours if I let it. But I would intervene and slow it as quickly as I could. My cardiologist pleaded with me to get to the ER when one occurred so they could capture it, but I'd always halt the event. Finally, my cardiologist put a 30 day monitor on me.