CureusCoronary Artery Calcium Score and Carotid Intima-Media Thickness As Markers of Computed Tomography Angiographic Severity in Coronary Artery Disease: A Cross-Sectional Study

ℹ️ Observational Association Only Evidence

This study examined whether two noninvasive atherosclerosis markers, coronary artery calcium score and carotid intima-media thickness, correlated with CT angiographic severity of coronary artery disease in symptomatic patients referred for CTCA. The authors used CT-derived SYNTAX and Gensini scores to quantify lesion complexity and stenosis burden, creating a cardiology-imaging question focused on whether upstream vascular markers align with anatomic CAD severity.

The study is clinically relevant because CACS and CIMT are familiar risk-assessment tools, but their relationship to CTCA-defined anatomical complexity is less well established. The article’s strongest finding is that CACS showed very strong positive correlations with both SYNTAX and Gensini scores, while CIMT showed moderate-to-strong correlations. However, this remains a cross-sectional, single-center association study, not a prospective outcomes study.

Clinical Considerations

• CACS correlated strongly with CAD severity, showing r = 0.813 with CT-SYNTAX and r = 0.851 with CT-Gensini.
• CIMT also tracked disease severity, with r = 0.583 for CT-SYNTAX and r = 0.694 for CT-Gensini.
• CACS outperformed CIMT numerically, especially for Gensini score, suggesting tighter alignment with CT-defined coronary plaque burden.
• Two patients with CAD had CACS = 0, reinforcing that calcium scoring can miss non-calcified plaque.
• The cohort included 75 symptomatic CTCA-referred patients, limiting generalizability to asymptomatic screening populations.
• The study excluded patients with CACS >450 Agatston units, which may limit applicability in heavily calcified disease.
• CIMT >0.8 mm aligned with higher CAD burden in this cohort, but that threshold needs validation before workflow use.
• The findings support CACS and CIMT as contextual risk-stratification markers, not substitutes for established diagnostics.

Practice Applications

• Interpret CACS as a marker of calcified coronary plaque burden, not total plaque burden.
• Recognize that CACS = 0 does not exclude non-calcified coronary disease.
• Consider CIMT as a systemic atherosclerosis signal when integrated with clinical and imaging data.
• Avoid using either marker alone to define CAD severity or treatment pathways.
• Integrate CTCA findings when symptoms, risk profile, or marker discordance raises clinical concern.
• Frame these correlations as hypothesis-generating until prospective outcome data are available.
• Monitor future studies evaluating combined CACS and CIMT algorithms against events, not only imaging scores.