I think you mean PSVT. I had SVT and it reoccurred frequently (almost daily). It doesn't always though, but the fact that your HR was so high is probably an indicator that either it will happen again, or that it is serious enough that dr won't want to take any chances. The two treatment options are medication or catheter ablation. Meds did nothing for me, so I had the catheter ablation. That was 15 years ago and I have not had another since.
In the meantime, avoid all caffeine, and alcohol. If an attack comes on, their are things you can do to get your heart back to normal. For me, it was a loud noise that made me jump a bit. You could learn vegal maneuvers.
After reading some of the other responses, I want to help clear something up. First of all, SVT and panic attacks are not related at all. Your heart has a specific plan in the electrical system about which part will be in charge and what instructions it will give to the rest of the heart. There is a detailed plan that if the main pacemaker isn't working properly, the next will pick up the job, and so on. Your heart has a terrorist piece. It takes over the whole job, stealing it from the normal pacemakers and does whatever it wants. It is like a short circuit in the electrical system. Maneuvers or meds can make that part give up control, or you may need to destroy it. A catheter ablation is the "surgery" mentioned, but is not really a surgery at all. They call it a procedure. The put a tube into the arteries in your groin and neck and they zap the place causing problems destroying the part that keeps taking over. It is not a big deal and only requires an overnight stay. They don't always find the part causing the problems because it looks the same as the rest of your heart. They have to test spots and spend time looking for it. If someone continues to have issues after the ablation, then they would go in and look for the spot again. The only issue I had with mine was that it is hard to walk for a few days while the arteries heal shut again. You have to lay in bed with sandbags on the spots for a while without moving a muscle for a few hours afterward. It was such a small deal that I would opt for the surgery again in a heartbeat (no pun intended) before I'd take a pill every day for the rest of my life! It was about the equivalent of getting my wisdom teeth pulled, but less pain. The cost of the ablation after insurance is probably less than the med copay for the rest of your life.