Heart Photo 3 (IMAGE) Intermountain Healthcare Caption While high cholesterol, high blood pressure, diabetes and smoking are well known heart disease risks, not everyone who has a heart attack has them. In fact, previous research has shown that 14% to 27% of heart attack patients have none of these risk factors. Now, a new study from researchers at Intermountain Health in Salt Lake City finds that these patients had one thing in common: they all tended to have high levels of coronary calcium. Credit Intermountain Health 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.