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8.5.3.1 Cardiology Measurements in the 2D Mode
Cardiology measurements in the 2D (B/Color/PDI) mode include left ventricle measurement,
left ventricle
weight measurement, inner diameter of right ventricle end diastole measurement and
inner diameter of
main pulmonary artery measurement.
8.5.3.2 Left Ventricle
The methods for measuring left ventricle in the 2D (B/Color/DPI) mode are as follows.
Single Plane
Bi Plane
Bullet
Mod. Simpson
Single plane
This measurement method calculates the LV volume by measuring the ellipse covering the long
axis of the
left ventricle.
Steps:
1.
Press the Measure key in the real time or frozen B/Color/PDI 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 [Single Plane] on the pop-up menu and a marker displays on the image.
4.
Perform the LVLd LVALd LVLs LVALs measurements one by one and the
measurement results
displays in the result box.
Measurement
Item
Measurement
Sub-item
Description
Measurement Method
LVLd
Left Ventricle
Diastolic Major Axis
Refer to Section
8.4.1.1 Distance.
LVALd
LV long axis area at end-diastole Refer to Section
8.4.1.2 Area and
Circumference.
LVLs
Left Ventricle
Systolic Major Axis
Refer to Section
8.4.1.1 Distance.
Left Ventricle/
Single Plane Method
LVALs
Left Ventricle
Systolic Area
Refer to Section
8.4.1.2 Area and
Circumference.
The system automatically calculates the following items according to the measurement results.
Calculation Item
Description
Formula
EDV
End-diastolic Left
Ventricular Volume(ml)
EDV(mL)=(8/3/
π
)
×
LVALd(
)/LVLd(cm)
ESV
End-systolic Left
Ventricular Volume(ml)
ESV(mL)=(8/3/
π
)
×
LVALs(
)/LVLs(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( )
You should input the height, weight and heart rate before performing the cardiac measurement.