My son is only 9 years old and has svt.  He had an ablation in May of this year but the svts continue to come.  Everyone says dont worry.  He just had 3 episodes tonight all above 220.  What do you advise?  Should he have another ablation, or just wait it out.  Can this damage his heart in any way or form
SVT in long run wouldn't have a gross effect on his heart function per se, however it has its own complications and as your son young, Again an ablation procedure should be considered.  Lastly the decision depends on the type of SVT and episode study results, and in some SVT ablation is more than 90% successful, while in some it's less than 50% and a real procedure may be required.  Also, a medication should be started if frequent episode is you plan to avoid ablation for time being.  Regards Chat Doctor.