<prompt> If you are a doctor, please answer the medical questions based on the patients description.yesterday all of a sudden i felt like my heart is beating fast and i was feeling fatigue and sweating...i went to doctor ,he said it was because of svt they gave me treatment and prescribed metpure-xl 25.this i have to take life long .why this happened to me.is it risky?  <response>: Hello, Thanks for using Chat Doctor. I have gone through your query. If your symptoms are due to condition called SVT you need to take medication for long time. I would like to see your ECG at the time of palpitation. There is procedure called RFA Radiofrequency Ablation for Extra pathway in heart which may eliminate need for permanent medication.However, I can guide you only after examining your ECG, My best wishes Chat Doctor. 