GE LOGIQ 500 Advanced Reference Manual page 115

LV Calculation Formulas (LV SP-DISC Method) (cont'd)
Calc Mnemonic
LVAd Left Ventricular Area,
Diastole
LVAs Left Ventricular Area,
Systole
HR Heart Rate
(beats/minute)
EdV End Diastole Volume
EsV End Systole Volume
SV Stroke Volume
EF Ejection Fraction
CO Cardiac Output
SI Stroke Volume Index
CI Cardiac Index
(*1) where a is the i
di
(*2) where a i is the i
s
Reference: Journal of American Society of Echocardiolography, Vol. 2 Nov 5, 1989.
Table 4–5. LV SP-DISC Method Formulas (cont'd)
LOGIQ 500 Advanced Reference Manual
2276614–100 Rev. 0
Calc Name
one area (by trace only) is
divided into 20 elliptical
disk segments
one area (by trace only) is
divided into 20 elliptical
disk segments
one 2 beat time interval
one distance and two
areas (by ellipse, trace or
circle)
one distance and two
areas (by ellipse, trace or
circle)
two distances and two
areas (by ellipse, trace or
circle)
two distances and two
areas (by ellipse, trace or
circle)
two distances and two
areas (by ellipse, trace or
circle) and one 2 beat time
interval
body surface area and SV
body surface area and CO
th
disc diameter of LVAd.
th
disc diameter of LVAs.
Advanced Cardiac Calculations
Input Measurements Formula
LVAd=a1[cm ^2]
LVAs=a1[cm ^2]
HR[BPM]=120 [sec]/ 2
beat time [sec]
EdV= (*1)
20
2
(p/4) * ((LVLd/20) a
di)
i=1
EsV= (*2)
20
2
(p/4) * ((LVLs/20) a
si)
i=1
SV[ml]=EdV–EsV
EF=SV/EdVx100
CO[1/min]=SVxHR/1000
SI[ml/m^2]=SV/BSA
CI[ml/min/m^2]=CO/BSA
4–69