i
MVA = ( LVOT CSA x LVOT TVI ) : MV TVI

LVOT TVI: PW, Apical 5C view or Apical 3C view.
MV TVI: CW, Apical 4C view.

This equation:
- cannot be used in cases of atrial fibrillation or associated significant MR or AR.


Output:
MV SV = LVOT SV
MVA x MV TVI = LVOT CSA x LVOT TVI
MVA = ( LVOT CSA x LVOT TVI ) : MV TVI

MVA - Mitral Valve Area
LVOT TVI - LVOT Time Velocity Integral
MV TVI - Mitral Valve Time Velocity Integral
MV SV - Mitral Valve Stroke Volume
LVOT SV - LVOT Stroke Volume