The Continuity Equation can be used to calculate the area of the mitral valve and estimate the degree of stenosis:

 

 

CSALVOT - Cross-Sectional Area of LVOT. VTIAo - VTI of the transaortic flow. VTIMV - VTI of the transmitral flow.

 

To calculate the cross-sectional area of LVOT (CSALVOT), it is necessary to measure the D-diameter of the Left Ventricular Outflow Tract (LVOT).

 

 

D - LVOT diameter.

 

Assessment of mitral stenosis by the Mitral Valve Area (MVA):

• Mild > 1.5 cm2
• Moderate 1.0 - 1.5 cm2
• Severe < 1.0 cm2

 

Left Parasternal View, the Long axis of LV. Measurement of the LVOT diameter. Simulation By Echocardiography Online Simulator MyEchocardiography.com

 

Apical 5 chamber view. CW Doppler. Control Volume in LVOT. Simulation By Echocardiography Online Simulator MyEchocardiography.com

 

Apical 5 chamber view. CW doppler. Measurement of the VTI LVOT. Simulation By Echocardiography Online Simulator MyEchocardiography.com

 

Apical 4 chamber view. CW doppler. VTI MV measurement. Simulation By Echocardiography Online Simulator MyEchocardiography.com

 

 

ASE Guideline - Echocardiographic Assessment of Valve Stenosis

 

How to Simulate Assessment degree of Mitral Stenosis by Continuity Equation? >>>

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