20212106-IMST-NHG_1372-CARD.jpg (IMAGE) University of Arizona Health Sciences Caption Dallin Tavoian, PhD, uses an ultrasound probe to obtain an image of an artery in the participant's upper arm. The flow-mediated dilation procedure assesses the artery's response to a change in blood flow, an important marker of cardiovascular health. Credit University of Arizona Health Sciences Usage Restrictions Reporters may freely use these materials in news coverage with the appropriate credit information. License Original 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.