Chison Q9, Operation Manual, Page: 118 / 201

Q9 Digital Color Doppler Ultrasound System
112
5.3.3.2
Cardiology Measurement in PW mode
1. MV
Measurement of Mitral valve function is performed in frozen Doppler spectral trace.
<<Measurement and calculation items>>
Meas. item name Description [Unit] Meas. procedure / Calc. formula
E Vel E-wave flow velocity [cm/s]
Refer to "Velocity Measurement'.
A Vel A-wave flow velocity [cm/s]
Refer to "Velocity Measurement'.
PHT Pressure half time [ms] Refer to " Velocity Measurement".
E Dur E-wave duration [ms] Refer to "Time Measurement (Time)".
A Dur A-wave duration [ms] Refer to "Time Measurement (Time)".
IRT Isovelocity relaxation time [ms] Refer to “Time Measurement (Time)".
MV VTI Mitral valve VTI [m] Refer to “Full trace”.
MV VM Mitral valve mean velocity
[cm/s] Refer to “Full trace”
MV VP Mitral valve maximum velocity
[cm/s] Refer to “Full trace”
MV MPG Mitral valve mean pressure
gradient [mmHg] Refer to “Full trace”
MV PPG Mitral valve maximum pressure
gradient [mmHg] Refer to “Full trace”
MV Diam Mitral valve diameter [mm] Refer to “Distance Measurement in B mode”
HR Heart rate [bpm] Refer to "Heart Rate Measurement (HR)"
E/A [no unit] E Vel / A Vel
A/E [no unit] A Vel / E Vel
SV Stroke volume [mL] 0.785 x (MVDiam)
2
* abs|VTI |
CO Cardiac output [L/min] SV x HR / 1000
MV Area Mitral valve area [mm
2
] 220/ PHT
Note:
[MV Diam] can only be performed in 2-D mode.
<<Measurement points>>
1) Measure [E Vel] and [A Vel]. Measure [PHT]. Measure [E-Dur], [A-Dur], and [IR] Measure [HR].