Which statement describes the contrast used in LV angiography?

Which statement describes the contrast used in LV angiography?

• A. A contrast agent containing iodine is injected to make the structure visible on X-ray
• B. A gadolinium-based agent is used for MRI
• C. Contrast is not used in LV angiography
• D. The contrast is absorbed by the tissues to measure chemical composition

Answer: (A)

LV angiography relies on an iodinated, radiopaque contrast agent injected into the left ventricle to outline the chamber on X-ray imaging. The iodine’s high atomic number makes it show up brightly on fluoroscopy, allowing clear visualization of the left ventricle’s size, shape, and wall motion during cine imaging. This is why the statement about an iodine-containing contrast making the structure visible on X-ray is the best choice. Gadolinium-based agents are used for MRI, not X-ray angiography, so they don’t apply here. The idea that contrast is absorbed by tissues to measure chemical composition isn’t how radiographic angiography works—images depend on differences in X-ray attenuation, not tissue chemical analysis.

LV angiography relies on an iodinated, radiopaque contrast agent injected into the left ventricle to outline the chamber on X-ray imaging. The iodine’s high atomic number makes it show up brightly on fluoroscopy, allowing clear visualization of the left ventricle’s size, shape, and wall motion during cine imaging. This is why the statement about an iodine-containing contrast making the structure visible on X-ray is the best choice. Gadolinium-based agents are used for MRI, not X-ray angiography, so they don’t apply here. The idea that contrast is absorbed by tissues to measure chemical composition isn’t how radiographic angiography works—images depend on differences in X-ray attenuation, not tissue chemical analysis.