Karen Christman and Hydrogel Tissue (IMAGE) University of California - San Diego Caption Karen Christman, professor in the Department of Bioengineering at UC San Diego, led the development of Ventrigel, a hydrogel to repair heart tissue after heart attacks. Credit David Baillot/University of California San Diego Usage Restrictions Please credit David Baillot/University of California San Diego 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.