Which of the following tests can assess coronary artery disease non-invasively?

• A. Chest X-ray
• B. Magnetic resonance angiography (MRA)
• C. Cardiac MRI
• D. Electrophysiological study

Answer: (B)

Magnetic resonance angiography (MRA) is a specialized imaging technique that uses magnetic resonance imaging (MRI) to visualize blood vessels, specifically the coronary arteries. This non-invasive method can provide detailed images of the coronary arteries, allowing for the assessment of any blockages or abnormalities that may indicate coronary artery disease.

MRA can effectively evaluate the luminal diameter of the coronary vessels, blood flow characteristics, and helps in identifying atherosclerosis, making it a valuable tool in diagnosing and managing coronary artery disease without needing any invasive procedures.

Other options, while important in their own contexts, do not serve effectively as non-invasive tests specifically for assessing coronary artery disease. For instance, a chest X-ray can provide some information about heart size and lung conditions but is not adequate for visualizing coronary arteries directly. Cardiac MRI, while useful for assessing cardiac function and structure, is not primarily used for evaluating coronary artery blockages. An electrophysiological study is an invasive procedure designed to assess electrical activity and arrhythmias in the heart, not for visualizing coronary arteries.