Tattoo Electrodes (IMAGE) Graz University of Technology Caption Conductive polymers printed on standard decal paper form the tattoo electrodes for longterm monitoring of electrical impulses of heart or muscles. Credit © Lunghammer - TU Graz Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.