Shear Stress Map (IMAGE) Optica Caption This is a map of the shear stress on a developing heart at four evenly spaced time points during a heart cycle. Red indicates areas of greater stress. Credit Biomedical Optics Express 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.