EDAN U60 - Page 147

U60 Diagnostic Ultrasound System User Manual Cardiac Measurements and Calculations
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2. TEICHHOLZ formula:
NOTE: d: end diastolic; s: end systolic
Label
Description
Method
LVIDd
Left Ventricle Internal Diameter
Distance (mm)
LVIDs
Left Ventricle Internal Diameter
Distance (mm)
ET
Ejection Time
Time (ms or s)
HR
Heart Rate
M mode heart rate measurement or key in (bpm)
EDV
End Diastolic Volume
EDV (mL)＝{7×LVIDd
3
(cm)
3
}/{2.4+ LVIDd}
ESV
End Systolic Volume
ESV (mL)＝{7×LVIDs
3
(cm)
3
}/{2.4+ LVIDs}
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)] ×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) x ET (ms)/1000}
BSA
Body Surface Area
Calculate by the selected formula (m
2
)
Table 9-2 Measurement and Calculation Items with TEICHHOLZ formula
3. Other measurement items:
Label
Description
Method
AOD
Aortic root Diameter
Distance (mm)
LAD
Left Atrium Diameter
CA
Cardiac cycle apex A
CE
Cardiac cycle apex E
EF SLP
Ejection Fraction Slope
Slope (mm/s)
ACV
AC Decreasing Velocity
DEV
Deceleration Velocity
DCT
Deceleration Time
Time (ms or s)