HeartWatch (IMAGE) West Virginia University Caption New West Virginia University research finds heart rate variability — the time between heartbeats — reported on smartwatches and rings is different from what’s recorded in clinical settings. Credit WVU Illustration/Aira Burkhart Usage Restrictions NONE 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.