Coronary calcium scans are widely used to spot early signs of artery disease, but a 10-year study of more than 6,000 adults suggests they often add little to standard risk predictions. For most people, the scans did not change how their heart disease risk was classified compared with traditional risk estimates.
That does not mean the scans are useless. The researchers found a clear exception: patients at borderline or intermediate risk. For these individuals, the imaging results could reveal who was actually at higher risk and might benefit from more aggressive prevention, even when standard tools left the picture uncertain.
The findings support a more selective approach to calcium scanning rather than routine screening. While most people may not see a change in their treatment plan, the test could be most valuable when standard risk estimates are ambiguous. The study's authors suggest that the decision to order a scan should hinge on whether knowing the calcium score would alter management.