EKG (also called ECG) is short for electrocardiogram. "Electro" refers to the heart's natural electrical activity, which the test records through small wires taped on your chest. You won't feel a thing. Back to Articles Related Articles Note: All information is for educational purposes only. For specific medical advice, diagnoses, and treatment, consult your doctor. © 1995-2021 KidsHealth®. All rights reserved. Images provided by The Nemours Foundation, iStock, Getty Images, Veer, Shutterstock, and Clipart.com.