As a Noun: 1. ECG is an abbreviation for electrocardiogram. If someone has an ECG, doctors use special equipment to measure the electric currents produced by that person's heart in order to see whether it is working normally. Note: 1. There appears to be no commonly used Auslan sign for ECG. If you know a sign for ECG used by you or other Auslan users (deaf people or interpreters) please go to "Report a missing sign" and supply details. Thank you.