Chison Q9 - 5.3.3.2 Cardiology Measurement in PW mode

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
-
wav
e 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 m
ode”
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].