P3V Veterinary Digital Ultrasonic Diagnostic Imaging System User Manual
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Figure 9-5 B Mode Cardiac Measurement and Calculation Menu
1. Items of Measurement and Calculation
B-CARDIAC MEAS: RV, LV, and PA.
2. Items of input
Heart Rate, LVET, and Height & Weight.
The default measurements are LVLs, LVALs, LVLd, and LVALd measurements with
single-plane ellipse.
The formulas of B mode cardiac LV measurement include Single plane ellipse, Dual plane
ellipse, Bullet, and Modified Simpson, shown as follows:
1. Single plane ellipse formula:
NOTE:
d: end diastolic; s: end systolic
Label
Description
Method
LVLd
Left Ventricle Long-axle Diameter
Distance (mm)
LVALd
Left Ventricle Area of Long-axle
Ellipse Area (mm
2
, cm
2
,
or
dm
2
)
LVLs
Left Ventricle Long-axle Diameter
Distance (mm)
LVALs
Left Ventricle Area of Long-axle
Ellipse Area (mm
2
, cm
2
,
or
dm
2
)
HR
Heart Rate
Key in (bpm)
EDV
End Diastolic Volume
EDV (mL)= (8/3
π
)
×{LVALd (mm
2
)
}
2
/
LVLd
(mm) /1000
ESV
End Systolic Volume
ESV (mL)= (8/3
π
)
×{LVALs (mm
2
)
}
2
/
LVLs
(mm) /1000
SV
Stroke volume
SV (mL)=EDV (mL)-ESV (mL)
CO
Cardiac Output
CO (L/min)= SV (mL) × HR (bpm)/1000
EF
Ejection fraction (B mode)
EF (No unit)= SV (mL)/ EDV (mL) 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
)
BSA
Body Surface Area
Calculate by the selected formula (m
2
)
