12 yr old son with SVT

My 12 y/o son just started suffering from exercise induced SVT 2 days in a row he went into SVT rate of 240 bpm lasting a few hours.  The first day he needed 6 mg of Adenosine the second it broke on its own after lying down on the litter in the ambulance.  I am a paramedic and so is his father neither one of us is very familiar with children suffering from SVT.  We are going to see a pediatric cardiologist on Monday and I would like to have some ideas in my head as to actions.  I have been doing a bunch of reading and it appears radiofrequency ablation is the best option however I have not seen very much on children.  Do you think it is safe for children or are medications a better route?  I would prefer my son not being on medication for life especially as a pre-teen.  

[770shelia]

I have heard that ablation is best. I am schdeuled to have one in a few weeks. I was told the meds make you tired, lower blood pressure,and can cause weight gain. I watched one be done on ORlive.com and it seemed pretty easy but I am sill scared.
The doc will prebebly do an EKG and an ECHO to rule ot structual heart problems, but I have heard of people having an ablation after just one episode. Good luck to you and your son