GE Logiq 500, Advanced Reference Manual

Page: 135 / 474

Advanced Cardiac Calculations
LOGIQ 500 Advanced Reference Manual
2276614–100 Rev. 0
4–89

Doppler Analysis – Mitral Valve (D-MV) (cont’d)
Calc Mnemonic Calc Name Input Measurements Formula
AccT Flow Acceleration Time one time interval AccT[msec or sec]=
t<PFV-MV>-ts<ET>
DecT Flow Deceleration Time one time interval DecT[msec or sec]=
te<ET>-t<PFV-MV>
PkFVI Peak Flow Velocity Intergal one velocity,
one time interval PkFVI[cm/s or m/s]=1.14 x
PFV-MV x ET/20+0.3
MeanFV Mean Flow Velocity flow velocities, one area
(by ellipse, trace or circle) MeanFV [cm/s or m/s]=
FVI/t<FVI>
SV Stroke Volume flow velocities and one
area (by ellipse, trace or
circle) SV[ml]=FVI x MVOA
SI Stroke Volume Index body surface area and SV SI[ml/m^2]=SV/BSA
CO Cardiac Output flow velocities, one area
(by ellipse, trace or circle)
and one time interval CO[1/min]=
SVxHR/1000
CI Cardiac Index body surface area and CO CI[ml/min/m^2]=
CO/BSA
MaxPG Maximum Pressure
Gradient two velocities MaxPG[mmHg]=
4 x (PFV-MV^2)
MeanPG Mean Pressure Gradient flow velocities MeanPG[mmHg]=
n
4 x
Σ
(V^2/n)
i=1
MVA Mitral Valve Area one time interval MVA[cm^2]= 220/PHT
Table 4–24. Mitral Valve (D-MV) (cont’d)