EDAN DUS 60 - Page 57

DUS 60 Digital Ultrasonic Diagnostic Imaging System User Manual Cardiology Measurements and Calculations
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MAVO1
Aortic Valve Volume Opened,
beginning
MAVO2
Aortic Valve Volume Opened,
ending
AA Aortic Amplitude
Distance (mm)
LVMW Left Ventricular Muscle Weight
LVMW (g) =1.04* ({IVSTd (cm)+LVIDd (cm)+LVPWd
(cm)}
3
-LVIDd
3
(cm)
3
)-13.6
LVMWI
Left Ventricular Muscle Weight
Index
LVMWI (No unit) = LVMW/BSA
A/E The ratio of CA to CE A/E (No unit) = CA (mm)/CE (mm)
LAD/AOD
Left Atrium Diameter / Aortic
root Diameter
LAD/AOD (No unit) = LAD (mm) / AOD (mm)
AVSV Aortic Valve Stoma Valve flow
AVSV (mL) = MAVO1 (cm)+MAVO2 (cm)*
ET (s)*50+AA (cm)
QMV Mitral Valve Flow QMV (mL) = 4*DEV (cm/s)*DCT (s)
Table 8-3 Other Measurement Items
4. Calculation items:
Label Description Method
EDV End Diastolic Volume
EDV (mL) = LVIDd
3
(mm
3
)/1000
CUBE formula
ESV End Systolic Volume
ESV (mL) = LVIDs
3
(mm
3
)/1000
CUBE formula
SV Stroke volume SV (mL) = EDV (mL)-ESV (mL)
CO Cardiac Output CO (L/min) = SV (mL) × HR (bpm)/1000
EF Ejection fraction (M mode) EF (No unit) = SV (mL)/ EDV (mL) × 100%
FS Fractional Shortening
FS (No unit) =[ {LVIDd (mm)- LVIDs (mm)}/ LVIDd
(mm) ]x 100%
SI Stroke Index SI (No unit)= SV (mL)/ BSA (m
2
)
CI Cardiac Index CI (No unit)= CO (L/min)/ BSA (m
2
)
MVCF
Mean Velocity Circumferential
Fiber Shortening
MVCF (No unit)= { LVIDd (mm)- LVIDs (mm)}/ {LVIDd
(mm) × ET (ms)/1000}
DUS 60 Digital Ultrasonic Diagnostic Imaging System User Manual Cardiology Measurements and Calculations
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BSA Body Surface Area (m
2
) Calculate by to the selected formula
LVMW Left Ventricular Muscle Weight
LVMW (g)=1.04*[{IVSTDd (cm)+LVIDd (cm) +
LVPWd
3
(cm)}
3
-LVIDd
3
(cm)
3
]-13.6
LVMWI
Left Ventricular Muscle Weight
Index
LVMWI (No unit)=LVMW/BSA
A/E The ratio of CA to CE A/E (No unit)= CA (mm)/CE (mm)
LAD/AOD
Left Atrium Diameter / Aortic
root Diameter
LAD/AOD (No unit)= LAD (mm)/AOD (mm)
AVSV Aortic Valve Stoma Valve flow
AVSV (mL)=MAVO1 (cm)+MAVO2 (cm)*
ET (s)*50+AA (cm)
QMV Mitral Valve Flow QMV (mL)=4*DEV (cm/s)*DCT (s)
Table 8-4 Calculation Items
8.1.1. LV
The B/M mode and M mode measurements of LV are based on ESV and EDV measurements,
which are calculated by LVIDs and LVIDd measurements.
After measuring LVIDs and LVIDd and entering Heart Rate, LVET, and Height & Weight, the
system calculates some physiological parameters, such as ESV, EDV, SV, EF, FS, CO, MVCF, SI,
and CI.
There are two calculation formulas for heart antrum volume in the B/M mode and the M mode, as
shown below.
Item Formula
TEICHHOLZ
EDV (mL)= 7 x LVIDd
3
(cm
3
)/{2.4 + LVIDd (cm)}
ESV (mL)= 7 x LVIDs
3
(cm
3
)/{2.4 + LVIDs (cm)}
CUBE
EDV (mL) = LVIDd
3 (
mm)
3
/ 1000
ESV (mL) = LVIDs
3 (
mm)
3
/ 1000
Table 8-5 TEICHHOLZ and CUBE Formula
NOTE:
Ensure that the value of LVIDd is bigger than that of LVIDs, or the system can not display
the calculation items.
SV and EF calculation is as below.
Measurement items:
LVIDs and LVIDd
To measure LV:
1. In the M-cardiac measurement menu, roll the trackball to highlight LV, and the secondary