GE Logiq 500, Расширенное справочное руководство

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