Hopefully this is not too a personal question, but what did they say about strenuous exercise and whatnot?I've got the same issues as Lockyer, I had an op to fix the problem, but it happened again in July, I've had another op and hopefully it's all sorted now.
Your pulse goes crazy and its out of rhythm making you feel sick and dizzy.
My pulse was racing at about 170 - 190 for 5 days (at rest)