Which view is best to measure the thickness of MAC?

Which view is best to measure the thickness of MAC?

• A. Apical four-chamber
• B. Apical two-chamber
• C. Subcostal view
• D. PSAX at MV

Answer: (D)

Measuring MAC thickness needs a view that slices the mitral annulus perpendicularly, so the thickness isn't distorted by the imaging angle. The parasternal short-axis view through the mitral valve typically gives a true cross-sectional plane across the annulus, allowing an accurate measurement of how thick the calcified tissue is. Apical four- and two-chamber views often cut the annulus obliquely, which foreshortens or distorts thickness, and subcostal windows can also be off-axis and less reliable for this measurement. So, the short-axis view at the mitral valve provides the most consistent and precise assessment of MAC thickness.

Measuring MAC thickness needs a view that slices the mitral annulus perpendicularly, so the thickness isn't distorted by the imaging angle. The parasternal short-axis view through the mitral valve typically gives a true cross-sectional plane across the annulus, allowing an accurate measurement of how thick the calcified tissue is. Apical four- and two-chamber views often cut the annulus obliquely, which foreshortens or distorts thickness, and subcostal windows can also be off-axis and less reliable for this measurement. So, the short-axis view at the mitral valve provides the most consistent and precise assessment of MAC thickness.