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LV Measurement Methods
LOGIQ 500 Basic Users Manual
2276612–100 Rev. 0
10–14
Modified Simpson’s Rule 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]
LVAMd
Left Ventricular Area,
Mitral Valve, Diastole
one area (by ellipse,
trace or circle)
LVAMd=a1[cm ^2]
LVAMs
Left Ventricular Area,
Mitral Valve, Systole
one area (by ellipse,
trace or circle)
LVAMs=a1[cm ^2]
LVAPd
Left Ventricular Area,
Papillary Muscles,
Diastole
one area (by ellipse,
trace or circle)
LVAPd=a1[cm ^2]
LVAPs
Left Ventricular Area,
Papillary Muscles,
Systole
one area (by ellipse,
trace or circle)
LVAPs=a1[cm ^2]
EdV
End Diastole Volume
one distance and two
areas (by ellipse, trace
or circle)
EdV[ml]=LVLd/3
x(LVAMd+(LVAMd+
LVAPd)/2+ LVAPd/3)
EsV
End Systole Volume
one distance and two
areas (by ellipse, trace
or circle)
EsV[ml]=LVLs/3
x(LVAMs+(LVAMs+
LVAPs)/2+ LVAPs/3)
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 or trace
or circle)
EF=SV/EdVx100
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 10–4. Modified Simpson’s Rule Method Formulas
Содержание 500
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