Coronary artery calcium scoring shows similar efficacy to traditional risk factors

New research and updated clinical guidelines suggest that coronary artery calcium (CAC) scoring may offer limited additional benefit over traditional risk assessment methods for preventing major cardiovascular events.

The CorCal Outcomes trial, led by Dr. Joseph B. Muhlestein of Intermountain Health Care, followed 5,772 patients over 4.2 years. The study compared statin initiation guided by CAC scores via CT scans against the traditional pooled cohort equation (PCE) risk assessments. Results showed no significant difference in major cardiovascular events (MACE)—including stroke, myocardial infarction, and all-cause mortality—between the two groups, with both experiencing a 2.7% event rate.

In light of such findings, the 2026 American College of Cardiology and American Heart Association (AHA) guidelines recommend selective use of calcium scoring. The guidelines suggest the scan is most appropriate for adults whose estimated 10-year risk of heart attack or stroke falls between 3% and 10%, targeting individuals whose risk is not low enough to ignore but not high enough to warrant decisive action without further testing.