What Can Tiny Waves Mean In An Ekg?

Is there a charge to answer a question. I am a almost 59 yr old female. I had an ekg a couple if months ago. My doc wanted me to do a repeat. Today I did that. He came in the room and told me looked like I could voltage but in the same breathe it is a normal ekg and that what he saw I could have had for years.aI looked at ut .All lines looked constant and matched,but this one line looked so much smaller than the others,almost very tiny,waves that looked the same. It was the only line that looked so small??? Now I am worried. No doctor ever brought this toy attention,or a hospital.