Planimetry for mitral stenosis is performed in which view?

Planimetry for mitral stenosis is performed in which view?

• A. PSAX
• B. Apical 4-chamber view
• C. Parasternal long-axis view
• D. Subcostal view

Answer: (A)

Planimetry of mitral stenosis relies on tracing the inner edge of the mitral valve orifice in diastole when the valve is fully open. To get an accurate area, you need a view that provides a true short-axis cross-section of the orifice, perpendicular to the direction of flow. The parasternal short-axis view at the level of the mitral valve delivers this ideal orientation, allowing a clean, cross-sectional trace of the orifice. Other views, like the apical 4-chamber or parasternal long-axis, often slice the orifice obliquely or fail to include the entire opening consistently, which can lead to inaccurate or inconsistent measurements. The subcostal window is not as reliable for this measurement due to variable orientation and suboptimal visualization. Therefore, planimetry is performed in the parasternal short-axis view.

Planimetry of mitral stenosis relies on tracing the inner edge of the mitral valve orifice in diastole when the valve is fully open. To get an accurate area, you need a view that provides a true short-axis cross-section of the orifice, perpendicular to the direction of flow. The parasternal short-axis view at the level of the mitral valve delivers this ideal orientation, allowing a clean, cross-sectional trace of the orifice. Other views, like the apical 4-chamber or parasternal long-axis, often slice the orifice obliquely or fail to include the entire opening consistently, which can lead to inaccurate or inconsistent measurements. The subcostal window is not as reliable for this measurement due to variable orientation and suboptimal visualization. Therefore, planimetry is performed in the parasternal short-axis view.