Modeling Replacement Heart Valves (VIDEO) Iowa State University This video is under embargo. Please login to access this video. To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Caption Computer models show the performance of replacement heart valves, including various thicknesses of biological tissues from cows or pigs, during a typical cardiac cycle. Credit Video courtesy of Ming-Chen Hsu/Iowa State University 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.