I, too, was diagnosed with SVT,
and a condition called POTS (where your blood flow
and heart beats vary depending on your body's position - sitting up, laying down, etc.)
I had seen 7 different cardiologist over a period of 8 years, most of them specializing in arrhythmia's and ablations. One night, I had what felt to me like a stroke - fast, painless, but half by face and body felt numb / tingly. I could function fine, but it FELT wrong.