Anatomic and Hemodynamic Plaque Characteristics for Subsequent Coronary Events

Area of Science:

• Cardiovascular Imaging
• Interventional Cardiology
• Radiology

Background:

• Coronary computed tomography angiography (CCTA) assesses coronary artery disease (CAD) plaque but its prognostic role is unclear.
• Evaluating CCTA-derived anatomic and hemodynamic plaque characteristics can improve risk prediction for CAD events.

Purpose of the Study:

• To assess the prognostic implications of CCTA-derived anatomic and hemodynamic plaque characteristics in predicting subsequent coronary events.
• To compare the predictive abilities of CCTA-derived parameters versus clinical risk factors.

Main Methods:

• Retrospective analysis of CCTA in 158 patients undergoing percutaneous coronary intervention (PCI) and 62 controls.
• Assessed high-risk plaque characteristics (HRPCs) and hemodynamic parameters (FFRCT, ΔFFR_CT, ischemic myocardial mass).
• Compared prognostic impact of clinical factors, HRPCs, and hemodynamics on subsequent coronary events.

Main Results:

• Vessels with events showed more HRPCs, lower FFR_CT, higher ΔFFR_CT, and higher ischemic myocardial mass.
• HRPCs and hemodynamic parameters demonstrated superior discriminant abilities compared to clinical risk factors.
• ΔFFR_CT was the strongest predictor; HRPCs added incremental value to clinical factors, especially in vessels with negative FFR_CT (>0.80).

Conclusions:

• CCTA-derived HRPCs and hemodynamic parameters offer superior prediction of subsequent coronary events than clinical risk factors alone.
• HRPCs provide additional predictive value to clinical risk factors in vessels with non-obstructive FFR_CT.