Unveiling the Hidden Cardiovascular Risk: Breast Arterial Calcification and Future Heart Health
Mammograms, a staple in breast cancer screening, may also hold a hidden treasure trove of information about cardiovascular health. A recent study, presented by Matthew Nudy at the Radiological Society of North America meeting, reveals that breast arterial calcification detected on mammograms could be a powerful predictor of future heart risks. This groundbreaking research highlights the potential of mammograms to identify women at higher risk for cardiovascular disease, a leading cause of death among adults.
The study, one of the first to track the progression of breast arterial calcification over time, found that severe calcification and its worsening progression significantly increase the risk of major cardiovascular events. Women with more severe calcification and those whose calcification worsened over time faced a higher risk of heart attack, stroke, heart failure, and even death. These findings suggest that breast arterial calcification could be a valuable marker for cardiovascular disease, helping identify women at the highest risk.
Nudy emphasizes the importance of better risk assessment tools, especially for women, as they are often diagnosed at later stages of cardiovascular disease and have worse outcomes post-heart attack. The current tools may underestimate women's risk, making early detection crucial. By assessing breast arterial calcification, healthcare professionals might enhance their ability to predict cardiovascular risk and take preventive measures.
As people age, calcium can accumulate in arteries, increasing the risk of heart attack and stroke. While CT scans can detect calcium in coronary arteries, they come with costs and radiation exposure, potentially deterring patients and physicians. In contrast, mammograms, already widely used for breast cancer screening, can identify calcifications in breast arteries. The American Cancer Society and the United States Preventative Services Task Force recommend at least biennial screening for women starting at age 40.
Despite the lack of direct association with breast cancer, the presence of calcium buildup in breast arteries isn't currently included in radiology reports. However, previous studies, including a systematic review and meta-analysis led by Nudy, have linked breast arterial calcification to future cardiovascular disease and death. This study, analyzing data from 10,348 women, utilized an investigational AI software to detect and assess calcification severity in breast arteries.
The results were striking: vascular calcification was present in 19.4% of participants at baseline. Those with more calcium accumulation over time had a higher risk of serious heart-related events, with the severe score category showing a twofold increased risk. The study also revealed that calcification can worsen rapidly, occurring within a year, and the faster the progression, the greater the cardiovascular risk.
Participants without initial calcium in breast arteries had the lowest risk of progression, but those with detected calcium on follow-up mammograms faced a 41% higher risk of adverse cardiovascular events and death over 5.6 years. Those who progressed from mild to moderate or moderate to severe categories had 59% and 93% higher risks, respectively. Nudy suggests that this data could be utilized for risk stratification, but more research is needed to understand its clinical application.
Collaborators on this research included Nitesh Nerlekar, Alyssa Watanabe, and experts from CureMetrix. The study's findings, presented at the Radiological Society of North America meeting, underwent a double-blind peer-review process, ensuring scientific rigor. The work was supported by CureMetrix, a company advancing AI tools for medical imaging analysis.
This study opens up exciting possibilities for using mammograms to predict cardiovascular risk, potentially improving prevention strategies. However, further research is essential to fully understand the relationship between breast arterial calcification and cardiovascular health, and how this information can be effectively utilized by healthcare professionals.
