I have had ectopic heartbeats for 42 years, svt for 11 years, I will see the electrophysiologist from Barts hospital 6 th March. I had an attack of svt a couple of weeks ago of 188 beats, adenisone did not put it back, put on a drip of sotalol and it gradually went back. I am on bisoprolol 1.25, not doing so well on it. My question is is it normal to feel unwell and lethargic? I will be 71 in 7 weeks! I am active , lately I have found it difficult to do my normal routine.