Incremental Prognostic Value of Quantified Vulnerable Plaque by Cardiac Computed Tomography: A Pilot Study

Area of Science:

• Cardiovascular Imaging
• Radiology
• Atherosclerosis Research

Background:

• Coronary computed tomography angiography (CCTA) enables detailed analysis of atherosclerotic plaques.
• Quantifying plaque subtypes using CCTA holds prognostic potential.

Purpose of the Study:

• To assess the prognostic value of CCTA-derived plaque subtype volumes in predicting adverse cardiovascular events.
• To investigate the association between specific plaque morphologies and patient outcomes.

Main Methods:

• Retrospective analysis of 36 patients with adverse events and 36 matched controls.
• CCTA images were used to quantify plaque volumes (low, intermediate, high attenuation, calcified) in epicardial arteries.
• Plaque volumes were normalized for arterial segment length.

Main Results:

• Patients with adverse events had significantly greater volumes of low-attenuation and intermediate-attenuation plaques compared to event-free patients.
• These differences were most pronounced in the proximal segments of the epicardial arteries.
• No significant difference in calcified plaque volume was observed between the groups.

Conclusions:

• Increased volumes of low and intermediate-attenuation plaques, indicative of lipid-rich and fibrous components, are associated with adverse cardiovascular events.
• The proximal epicardial arteries are a key location for identifying these high-risk plaques.
• CCTA-based plaque quantification offers valuable prognostic information for cardiovascular risk stratification.