Screening for Ischemic Heart Disease with Cardiac CT: Current Recommendations
1Los Angeles Biomedical Research Institute, Harbor-UCLA Medical Center, 1124 West Carson Street, Torrance, CA 90502, USA.
Insights
Coronary artery calcium (CAC) screening significantly improves cardiovascular risk prediction beyond traditional factors. CAC testing helps reclassify patients, enabling better treatment strategies for preventing heart events.
Area of Science:
- Cardiology
- Preventive Medicine
- Medical Imaging
Background:
- Cardiovascular disease is the leading cause of death globally, with traditional risk assessments often underestimating actual patient risk.
- Established risk factors for atherosclerosis do not fully capture an individual's coronary risk profile.
- There is a need for more effective screening methods to identify individuals at high risk for cardiovascular events.
Purpose of the Study:
- To highlight the significance of Coronary Artery Calcium (CAC) scoring in cardiovascular risk assessment.
- To emphasize CAC's superior predictive capability compared to traditional risk factors.
- To discuss the role of CAC in guiding treatment strategies and reclassifying patient risk.
Main Methods:
- Coronary Artery Calcium (CAC) scoring as a measure of calcified atherosclerosis.
- Comparison of CAC predictive performance against traditional risk factors and models like Framingham Risk Score.
- Review of current guidelines incorporating CAC into cardiovascular risk assessment.
Main Results:
- CAC is the strongest predictor of future cardiovascular events, providing incremental value over traditional risk factors.
- CAC testing effectively reclassifies individuals, identifying those who are intermediate risk but actually high or low risk.
- CAC progression over time is associated with a markedly increased risk of adverse cardiovascular events.
Conclusions:
- Coronary Artery Calcium scoring is a robust tool for enhancing cardiovascular risk prediction and patient management.
- CAC testing facilitates personalized treatment strategies by accurately identifying high-risk individuals.
- Further research is ongoing to determine optimal intervals for serial CAC scanning.
Abstract:
Cardiovascular disease remains the leading cause of mortality in the US and worldwide, and no widespread screening for this number one killer has been implemented. Traditional risk factor assessment does not fully account for the coronary risk and underestimates the prediction of risk even in patients with established risk factors for atherosclerosis. Coronary artery calcium (CAC) represents calcified atherosclerosis in the coronary arteries. It has been shown to be the strongest predictor of adverse future cardiovascular events and provides incremental information to the traditional risk factors. CAC consistently outperforms traditional risk factors, including models such as Framingham risk to predict future CV events. It has been incorporated into both the European and American guidelines for risk assessment. CAC is the most robust test today to reclassify individuals based on traditional risk factor assessment and provides the opportunity to better strategize the treatments for these subjects (converting patients from intermediate to high or low risk). CAC progression has also been identified as a risk for future cardiovascular events, with markedly increased events occurring in those patients exhibiting increases in calcifications over time. The exact intervals for rescanning is still being evaluated.
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