Calcium on mammograms signals higher heart risk for women

A calcium spot on a mammogram usually means a healthy breast. But new research shows this sign might warn about heart trouble instead. A massive review looked at data from about 30,000 women over six to 12 years. They found that breast arterial calcification, or BAC, was linked to significantly higher chances of having a heart event. The risk was nearly double for those with this calcium buildup. This finding matters because mammograms are already done for breast checks. Seeing calcium there could help doctors spot heart danger earlier in women who often get missed by standard tests. The study also showed a very strong link between this calcium and actual coronary artery disease. This means the calcium is not just a random mark but a sign of underlying heart blockage. While the review combined many smaller studies, the signal was clear and consistent across the data. No safety issues were reported because this is a sign seen on an image, not a treatment. This simple marker could become a powerful tool to protect women's hearts without adding extra cost or time to their routine care.