Great news that your son  has made it thru his first year that can be the hardest to get thru. Can i ask was it SVT he was been treated for? and what meds was he on.

I am now at 35 having racing heart beat but it is thought to of been with me for many years and have been put on beta blockers.

you will probably still have to be monitored, but it is great news.

luv jayne