Severe MAC thickness is defined as greater than how many millimeters?

Severe MAC thickness is defined as greater than how many millimeters?

• A. 8 mm
• B. 10 mm
• C. 12 mm
• D. 5 mm

Answer: (B)

Severe thickening of the mitral annulus calcification is defined as more than 10 millimeters. When the calcification reaches this extent, the annulus becomes markedly rigid, which can restrict leaflet motion and complicate valve interventions. To assess it, measure the maximal thickness of the calcified posterior annulus in the parasternal long-axis view, with calipers perpendicular to the annular plane, usually in diastole for consistency. This 10 mm cutoff provides a standardized way to categorize severity and informs planning and risk assessment.

Severe thickening of the mitral annulus calcification is defined as more than 10 millimeters. When the calcification reaches this extent, the annulus becomes markedly rigid, which can restrict leaflet motion and complicate valve interventions. To assess it, measure the maximal thickness of the calcified posterior annulus in the parasternal long-axis view, with calipers perpendicular to the annular plane, usually in diastole for consistency. This 10 mm cutoff provides a standardized way to categorize severity and informs planning and risk assessment.