Figure 2. (IMAGE) Moscow Institute of Physics and Technology Caption Excitation propagation in a mouse heart with simultaneous use of voltage-sensitive dye RH237 (a, left) and calcium-sensitive dye Rhod2AM (a, right). Action potential and calcium transient recordings of whole mouse heart (b) and rat cardiac slice (c). Credit Brianna Cathey et al./<em>Scientific Reports</em> 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.