Coronary angiography is used to visualize which of the following structures?

• A. Lungs
• B. Location of plaques in coronary arteries
• C. Cardiac conduction system
• D. Brain vessels

Answer: (B)

Coronary angiography is a procedure that uses a contrast dye injected into the coronary arteries to produce X-ray images of their internal lumen. This allows direct visualization of where atherosclerotic plaques are located and how much they narrow each artery. Knowing the exact pattern and severity of narrowing helps determine if and how to intervene, such as with angioplasty or bypass surgery.

It doesn’t image the lungs, which would require chest imaging; it doesn’t assess the cardiac conduction system (which is evaluated with ECGs or electrophysiology studies); and it doesn’t visualize brain vessels (which need cerebral angiography or other brain imaging).