Hello Doctor! I am Loi, female, 41 years old, 4'11" height and 84 lbs weight. I had a check up from a doctor 30 yrs ago and he told me that there's something wrong with my heart beat. It's not normal its like a scallop. He can't find whats wrong since the result of my ECG/EKG is also normal. I had another heart check up last year and it's the same findings. I don't get any medicine. My problem is every time I am sad, angry, or emotionally stressed, my heart beat become faster and my legs became weak especially my left knee. I had this problem since I was 30 yrs old. What do you think is my health problem? Please help me. Thanks.