question: what is abnormal repolarization possible nonspecific. I have just had an ECG (EKG) and been told I need to speak to my doctor. I have had hole in the heart surgery when I was 10 yrs old and repair on atrial fibrillation 10 yrs ago ( I am 37). Lately I have been experiencing palpitations, light headed and breathlessness. Not sure if it s physical or I am having anxiety attacks. Bloods all done and normal. Just worried about this ECG result. Can t find anything on net about it. Thank you in advance