Heart Attack (IMAGE) Intermountain Medical Center Caption New research study shows that identifying the presence or absence of coronary artery calcium (CAC) in a patients' arteries can help determine their future risk of a heart attack. Credit Intermountain Healthcare Heart Institute 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.