Chison Q9, Operation Manual, Page: 92 / 201

Q9 Digital Color Doppler Ultrasound System
86
[mL] volume>>
ESV End-systolic left ventricular volume
[mL] Refer to << Calculation formula for
volume>>
SV Stroke volume [mL] SV=EDV – ESV
CO Cardiac output [L/min] CO=SV x HR /1000
EF Ejection fraction [no unit] EF=SV/ EDV
5. Cube Method
This method calculates the left ventricular volume by approximating the given region to a cube.
Calculation formula for volume
EDV =LVIDd
3
ESV =LVIDs
3
<< Items to be measured>>
Meas. item name Description
Meas. method
Diastole End-diastolic left ventricular
measurements Refer to “Measurement position”
IVSTd lnterventricular septal thickness at
end diastole Refer to "Distance Measurement
(Distance)".
LVIDd Left ventricular short-axis
diameter at end diastole Refer to "Distance Measurement
(Distance)".
LVPWd Left ventricular posterior wall
thickness at end diastole Refer to "Distance Measurement
(Distance)".
IVSTs lnterventricular septal thickness at
end systole Refer to "Distance Measurement
(Distance)".
LVIDs Left ventricular short-axis
diameter at end systole Refer to "Distance Measurement
(Distance)".
LVPWs Left ventricular posterior wall
thickness at end systole Refer to "Distance Measurement
(Distance)".
<<Items to be calculated>>
Calc. item name Description [Unit] Calc. formula
EDV End-diastolic left ventricular volume
[mL]
Refer to << Calculation formula for
volume>>
ESV End-systolic left ventricular volume
[mL]
Refer to << Calculation formula for
volume>>
SV Stroke volume [mL] SV=EDV – ESV
CO Cardiac output [L/min] CO=SV x HR /1000
FS Fractional shortening FS=(LVIDd-LVIDs)LVIDd
6. Teichholz Method
Calculation formula for volume
EDV =(7*LVIDd
3
) / (2.4+LVIDd)
ESV =(7*LVIDs
3
) / (2.4+LVIDs)
The items to be measured, the measurement procedures, and the items to be
calculated are identical to those in subsection ”CUBE method”.
7. LV/RV