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 These are computer models of replacement aortic heart valves. The models show biological tissues built into the valves at thicknesses of 100%, 75%, 50% and 25%. You can see fluttering in the thinner tissues at the bottom. Credit Videos 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.