Which imaging procedure is used to visualize location of plaques within the coronary arteries?

Which imaging procedure is used to visualize location of plaques within the coronary arteries?

• A. Nerve conduction velocity
• B. Doppler ultrasonography
• C. Chest radiograph
• D. Coronary angiography

Answer: (D)

Visualizing where plaques sit inside the coronary arteries requires an imaging method that directly images the arterial lumen with contrast. Coronary angiography does this by threading a catheter to the coronary arteries and injecting radiopaque contrast, then taking X-ray images. The resulting pictures show the luminal narrowing caused by atherosclerotic plaques and reveal their exact location along the coronary tree, making it the primary tool for diagnosing coronary artery disease and guiding interventions. Nerve conduction velocity looks at nerve signal transmission rather than blood vessels. Doppler ultrasonography estimates blood flow and velocity, which can hint at blockages but does not provide direct, detailed visualization of plaque location inside the small coronary arteries. Chest radiographs show the heart and lungs at a broad level but do not reveal plaque deposits within the coronary arteries.

Visualizing where plaques sit inside the coronary arteries requires an imaging method that directly images the arterial lumen with contrast. Coronary angiography does this by threading a catheter to the coronary arteries and injecting radiopaque contrast, then taking X-ray images. The resulting pictures show the luminal narrowing caused by atherosclerotic plaques and reveal their exact location along the coronary tree, making it the primary tool for diagnosing coronary artery disease and guiding interventions.

Nerve conduction velocity looks at nerve signal transmission rather than blood vessels. Doppler ultrasonography estimates blood flow and velocity, which can hint at blockages but does not provide direct, detailed visualization of plaque location inside the small coronary arteries. Chest radiographs show the heart and lungs at a broad level but do not reveal plaque deposits within the coronary arteries.