Pht (Pressure Half Time); Mva (Mitral Valve Area) - GE Logiq 500 User Manual

Additional Cardiac Calculations

PHT (Pressure Half Time)

A PHT measurement is used to calculate Mitral Valve Area
(MVA). The measurement is taken on the Doppler spectral
display of the mitral valve.
Figure 10–26. PHT Measurement on Mitral Valve Waveform
Select PHT from of the Calculation Sub-Menu. Perform a time
interval measurement as described 7–18 . Set the first cursor
on the peak of the mitral valve waveform and the second on to
a point halfway down the mitral valve waveform slope.
Figure 10–27. Cardiac Calculation Sub-Menu

MVA (Mitral Valve Area)

A Mitral Valve Area is calculated from the pressure half time
measurement. If PHT was selected, MVA is also calculated. If
MVA is selected, PHT must be measured in order to calculate
MVA.
10–24
PHT ET Max PG
MVA Mean PG
TRACE
AUTO
LV
Report
LOGIQ 500 Basic Users Manual
2233658–100 Rev. 0