Figure 1. (image) Moscow Institute of Physics and Technology Share Print E-Mail Caption Initiated in the right atrium, electrical excitation spreads through the cardiac conduction system. Credit @tsarcyanide/MIPT Press Office Usage Restrictions None Share Print E-Mail 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.