Full Digital Color Doppler Ultrasonic Diagnostic Instruments (Vet) User’s Manual V1.01
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EDV
End-diastolic Left Ventricular
Volume
EDV(ml)=(7×LVIDd
)/(2.4 + LVIDd(cm))
FS
Fractional Shortening
FS = 100%×(LVIDd(cm)- LVIDs(cm))/ LVIDd(cm)
ESV
End-systolic Left Ventricular
Volume
ESV(ml)=(7×LVIDs
)/(2.4+LVIDs(cm))
SV
Stroke Volume
SV = EDV(ml) - ESV(ml)
EF
Ejection Fraction
EF=100%×SV(ml)/EDV(ml)
SI
Stroke Volume Index
SI=SV(ml)/BSA
CO
Cardiac Output
CO(l/min)=SV(ml)× HR(bpm)/1000
CI
Cardiac Index
CI=CO(l/min)/BSA
MVCF
Mean Velocity of
Circumferential Fiber Shortening
MVCF(circ/s)=(LVIDd(cm)–LVIDs(cm))/
((LVIDd(cm)×ET(s))
Cube method
This measurement method approximates to the LV volume by measuring a cube.
Steps:
1.
Press the
Measure
key in the real time or frozen M mode, and the measurement menu displays on the
top left of the screen.
2.
Select [LV] on the menu by moving the trackball and press
Set
to confirm.
3.
Select [Cube] on the pop-up menu and a marker displays on the image.
4.
Perform the LVIDd -> LVIDs measurements one by one and the measurement results displays in the
result box.
Measurement
Item
Measurement
Sub-item
Description
Measurement Method
Left Ventricle/
Cube Method
LVIDd
LV internal dimension at end
diastole
Refer to Section 10.5.2.1
Distance.
LVIDs
LV internal dimension at end systole
The system automatically calculates the following items according to the measurement results.
Calculation
Item
Description
Formula
EDV
End-diastolic Left Ventricular Volume
EDV(ml)=LVIDd
FS
Fractional Shortening
FS = 100%×(LVIDd(cm)- LVIDs(cm))/
LVIDd(cm)
ESV
End-systolic Left Ventricular Volume
ESV(ml)=LVIDs
SV
Stroke Volume
SV = EDV(ml) - ESV(ml)
EF
Ejection Fraction
EF=100%×SV(ml)/EDV(ml)
SI
Stroke Volume Index
SI=SV(ml)/BSA
CO
Cardiac Output
CO(l/min)=SV(ml)× HR(bpm)/1000
CI
Cardiac Index
CI=CO(l/min)/BSA
MVCF
Mean Velocity of Circumferential
Fiber Shortening
MVCF(circ/s)=(LVIDd(cm)–LVIDs(cm))/
((LVIDd(cm)×ET(s))
