Heart Muscle (image) Brigham and Women's Hospital Caption These images show heart muscle cells aligning and stretching on the surface of micropatterned gels. Credit Image courtesy of Ali Khademhosseini lab. Usage Restrictions Please only use with associated press release. 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.