thanks for writing to us.
i will share two important principles of medicine practice with you. 1. if you have been advised an ECG always get it reported from the doctor who advised it and seek his opinion only on it. 2nd. None in this world will tell you anything good about an ECG without looking at it.
in a 7 year old child is rare and mostly, is not diagnosed by T wave
abnormalities. so relax. and see the physician who advised you the ECG.
feel free to write for further queries