Coronary CT angiography in managing atherosclerosis

Area of Science:

• Cardiovascular Imaging
• Radiology
• Medical Diagnostics

Background:

• Invasive coronary angiography (ICA) has been the gold-standard for coronary artery imaging.
• Noninvasive coronary computed-tomography angiography (CCTA) has significantly advanced over the past two decades.
• CCTA allows visualization of atherosclerotic lesions within the vessel wall, unlike ICA's lumenography.

Purpose of the Study:

• To evaluate the diagnostic capabilities of CCTA in imaging coronary arteries.
• To compare CCTA with ICA for detecting coronary artery disease and stenoses.
• To explore CCTA's role in characterizing atherosclerotic plaque and risk stratification.

Main Methods:

• Review of advancements in CCTA technology for coronary artery imaging.
• Comparison of CCTA's ability to visualize atherosclerotic lesions versus ICA.
• Analysis of CCTA's accuracy in ruling out coronary artery disease and assessing stenosis severity.
• Characterization of calcified and non-calcified plaques using CCTA and quantification methods like Agatston-Score.

Main Results:

• CCTA demonstrates excellent accuracy in ruling out coronary artery disease.
• CCTA can visualize atherosclerotic lesions, providing insights into plaque composition (calcified, non-calcified).
• Stenosis degree is often overestimated by CCTA, potentially reducing specificity.
• Higher Agatston-Scores for calcified plaques correlate with adverse cardiovascular outcomes.

Conclusions:

• CCTA is a valuable noninvasive tool for excluding coronary artery disease and significant stenoses.
• CCTA aids in advanced cardiovascular risk stratification by characterizing plaque burden and composition.
• While CCTA excels in detection, its limitations in specificity for stenosis grading require consideration.