Hello Ashby, I can certainly relate to how you feel. I have had SVT since I was a little girl- And I clocked in between 210 and 240. I reached a point, about 7 years ago when meds were not working. A PVA (pulmonary vein ablation) solved the problem for me. I understand your feelings about flying , or being in a situation where an emergency room visit isn't viable. I realized, once I started feeling limited in my choices because of my heart I had to find a more permanent solution. I would like to say that I avoided any suggestions regarding a pacemaker, mainly because you would have to be pacemaker dependent, with a sinus node ablation. I think that there are other avenues and choices before making that one. I had SVT since I was a young child, (am now 68) and in my 50's I developed atrial fibrillation and atrial flutter. I did have 4 failed attempts at ablations but it was the 5th, more extensive, PVA that was successful. So far, so good. If you are feeling that your symptoms are interfering with your life choices I would think its time to find a better solution. I wish you luck and an appointment with a good EP!!