GE Medical Systems 500, User Manual, Page: 328 / 636

LV Measurement Methods
LOGIQ 500 Basic Users Manual
2276612–100 Rev. 0
10–16

Single Plane Ellipsoid Method (cont’d)
Calc Mnemonic Calc Name Input Measurements Formula
LVLd Left Ventricular Length,
Diastole one distance LVLd=d1[cm or mm]
LVLs Left Ventricular Length,
Systole one distance LVLs=d1[cm or mm]
LVAd Left Ventricular Area,
Diastole one area (by ellipse,
trace or circle) LVAd=a1[cm ^2]
LVAs Left Ventricular Area,
Systole one area (by ellipse,
trace or circle) LVAs=a1[cm ^2]
EdV End Diastole Volume one distance and two
areas (by ellipse, trace
or circle)
EdV[ml]=8/(3
p
)
x(LVAd)^2/LVLd
EsV End Systole Volume one distance and two
areas (by ellipse, trace
or circle) EsV[ml]=8/(3
p
)
x(LVAs)^2/LVLs
SV Stroke Volume two distances and four
areas (by ellipse, trace
or circle) SV[ml]=EdV–EsV
CO Cardiac Output two distances and four
areas (by ellipse, trace
or circle) and one 2 beat
time interval CO[1/min]=SVxHR/1000
EF Ejection Fraction two distances and four
areas (by ellipse, trace
or circle) EF=SV/EdVx100
HR Heart Rate
(beats/minute) one 2 beat time interval HR[BPM]=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 10–5. Single Plane Ellipsoid Method Formulas