GE Medical Systems 500, User Manual, Page: 322 / 636

LV Measurement Methods
LOGIQ 500 Basic Users Manual
2276612–100 Rev. 0
10–10
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Teichholz Method (cont’d)
Calc Mnemonic Calc Name Input Measurements Formula
LVIDd Left Ventricular Internal
Diameter, Diastole one distance LVIDd=d1[cm or mm]
LVIDs Left Ventricular Internal
Diameter, Systole one distance LVIDs=d1[cm or mm]
IVSd Interventricular Septal
Thickness, Diastole one distance IVSd=d1[cm or mm]
IVSs Interventricular Septal
Thickness, Systole one distance IVSs=d1[cm or mm]
LVPWd Left Ventricle Posterior
Wall Thickness, Diastole one distance LVPWd=d1[cm or mm]
LVPWs Left Ventricle Posterior
Wall Thickness, Systole one distance LVPWs=d1[cm or mm]
EdV End Diastole Volume one distance EdV[ml]=LVIDd^3x7/(2.4
+LVIDd)
EsV End Systole Volume one distance EsV[ml]=LVIDs^3x7/(2.4
+LVIDs)
SV Stroke Volume two distances SV[ml]=EdV–EsV
CO Cardiac Output two distances and one 2
beat time interval CO[1/min]=
SVxHR/1000
EF Ejection Fraction two distances EF=SV/EdVx100
FS Fractional Shortening two distances FS=(1–LVIDs/
LVIDd)x100
HR Heart Rate
(beats/minute) one 2 beat time
interval HR=120[sec]/
2 beat time[sec]
PHT Pressure Half Time one time interval PHT=t1[ms orsec]
MVA Mitral Valve Area one pressure half time
interval MVA[cm^2]= 220/PHT
ET Ejection Time one time interval ET=t1[ms or sec]
Table 10–2. Teichholz Method Formulas