Quantitative Evaluation of Coronary Plaque Progression by Computed Tomographic Angiography
Insights
Computed tomographic angiography reveals coronary plaque progression in patients with acute coronary syndrome. Serial analysis showed increased plaque burden and reduced minimum luminal area, indicating disease advancement over 12 months.
Area of Science:
- Cardiovascular Imaging
- Interventional Cardiology
- Medical Diagnostics
Background:
- Coronary artery disease (CAD) is a leading global cause of mortality.
- Understanding plaque progression is crucial for effective patient management.
- Nonculprit plaques contribute to cardiovascular events.
Purpose of the Study:
- To quantitatively assess the 12-month progression of nonculprit coronary plaques.
- To evaluate plaque morphology and vessel remodeling using computed tomographic angiography.
- To determine the feasibility of serial computed tomographic angiography for plaque evaluation.
Main Methods:
- 21 patients with acute coronary syndrome underwent computed tomographic angiography.
- Right coronary arteries were analyzed in 3-mm segments at baseline and 12-month follow-up.
- Evaluated minimum luminal area, plaque burden, plaque volume, and vessel remodeling.
Main Results:
- Plaque burden increased by 0.34% (P=0.02) over 12 months.
- Minimum luminal area decreased by 0.05 mm² (P=0.012).
- Negative remodeling (vessel reduction) occurred in 43% of analyzed segments.
Conclusions:
- Serial computed tomographic angiography effectively quantifies coronary plaque progression.
- Findings demonstrate subtle but significant plaque changes and vessel remodeling in CAD patients.
- This imaging technique aids in assessing disease advancement and guiding treatment decisions.
Abstract:
Understanding plaque formation in patients at risk for coronary artery disease-the leading cause of morbidity and death in the world-enables physicians to better determine whether and how to treat these individuals. We used computed tomographic angiography to quantitatively evaluate the progression of nonculprit coronary plaques along the full length of the right coronary artery in 21 patients with acute coronary syndrome. Each right coronary artery was analyzed in sequential, 3-mm-long segments, and the minimum luminal area, plaque burden, and plaque volume within each segment were evaluated at baseline and at 12-month follow-up. Serial remodeling of the right coronary artery was also evaluated. In total, 625 arterial segments were analyzed. At 12-month follow-up, the plaque burden had increased slightly by 0.34% (interquartile range [IQR], -4.32% to 6.35%; P=0.02), and the plaque volume was not significantly changed (0.33 mm3; IQR, -3.05 to 3.54; P=0.213). The minimum luminal area decreased 0.05 mm2 (IQR, -1.33 to 0.87 mm2; P=0.012), and this was accompanied by vessel reduction, as evidenced by negative remodeling in 43% of the 625 segments. We conclude that serial computed tomographic angiography can be used to quantitatively evaluate the morphologic progression of coronary plaques.
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