P3V Veterinary Digital Ultrasonic Diagnostic Imaging System User Manual
- 102
-
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
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 (cm)}
ESV
End Systolic Volume
ESV (mL) = {7 × LVIDs
3
(cm)
3
}/{2.4+ LVIDs
(
cm)}
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)
