Scientists First to See Trafficking of Immune Cells in Beating Heart (image) Washington University School of Medicine Share Print E-Mail Caption Working in mice, scientists at Washington University School of Medicine in St. Louis have used two-photon imaging to capture the first images of a beating heart at a resolution so detailed they can track individual immune cells swarming into the heart, causing inflammation. These immune cells, shown in green, are moving from the blood vessels in the heart into the heart muscle. Credit Washington University in St. Louis Usage Restrictions Credit required 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.