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[Imaging in atherosclerosis: coronary arteriography]
G Russo1, V Calvi, C Tamburino
1Istituto di Cardiologia, Università degli Studi, Catania.
Insights
Coronary arteriography is the premier imaging method for coronary atherosclerosis, despite limitations in assessing plaque burden and stenosis severity. Quantitative techniques and morphology analysis improve lesion characterization and guide revascularization decisions.
Area of Science:
- Cardiovascular Imaging
- Interventional Cardiology
- Medical Diagnostics
Background:
- Coronary arteriography is the gold standard for evaluating coronary atherosclerosis.
- Limitations include underestimation of lesion severity and poor correlation with coronary flow reserve.
- The technique visualizes lumen "silhouette" but not artery wall plaque or reference vessel disease.
Purpose of the Study:
- To highlight the strengths and limitations of coronary arteriography in assessing coronary atherosclerosis.
- To discuss advancements in quantitative coronary arteriography and morphology analysis.
- To emphasize its continued importance in guiding revascularization strategies.
Main Methods:
- Review of pathologic and physiologic studies on arteriography limitations.
- Discussion of advancements in quantitative coronary arteriography (QCA).
- Emphasis on morphological analysis for lesion characterization.
Main Results:
- Arteriography provides lumen "silhouette" but not artery wall plaque information.
- Reference vessel disease can confound stenosis measurements.
- Quantitative methods reduce inter- and intra-observer variability.
- Morphology analysis enhances lesion characterization.
Conclusions:
- Coronary arteriography remains indispensable for selecting revascularization procedures like bypass graft and angioplasty.
- Quantitative analysis and morphology assessment improve diagnostic accuracy.
- Despite limitations, it provides crucial data for interventional cardiology.
Abstract:
Arteriography is still today the best imaging technique to evaluate coronary atherosclerosis. Some limitations have nonetheless been documented by pathologic studies (underestimated lesions), and by physiologic studies (poor correlation between stenosis and coronary flow reserve). Such limitations are due to the nature of the technique, as it provides the "silhouette" of the artery lumen, but does not provide any information on the artery wall, where the atherosclerotic plaque is located. Moreover, very often the vessel segment used as reference for stenosis calculation could also be affected by atherosclerosis; this occurrence plagues measurement of percent stenosis. On the other hand, a better usage of radiological techniques has also allowed a better assessment of certain stenosis shapes, such as eccentric or slit-like lesions. The introduction of quantitative coronary arteriography has overcome the problems related to visual assessment, such as the inter and intra observer variability. Furthermore, the recognized value of morphology analysis allows today a better characterization of the lesion. Coronary arteriography remains today a non-replaceable technique with regard to the choice of the most suitable revascularization procedures (coronary artery bypass graft, percutaneous transluminal coronary angioplasty) and supplies fundamental information for the interventional procedures.