Systolic Turbulent Blood Flow (IMAGE) University of Bern Caption Time evolution (from left to right) of systolic turbulent blood flow past a bileaflet mechanical heart valve. Credit H. Zolfaghari, ARTORG Center, University of Bern 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.