132 Measurement publications and terminology
where: RV=RegurgitantVolume
MVSV=MitralStrokeVolume
Regurgitant Volume (RV) in cc
Reynolds,Terry.TheEchocardiographer’sPocket
Reference.SchoolofCardiacUltrasound,Arizona
HeartInstitute,(2000),396,455.
RV=ERO*MRVTI
Right Ventricular Systolic Pressure (RVSP) in
mmHg
Reynolds,Terry.TheEchocardiographer’sPocket
Reference.SchoolofCardiacUltrasound,Arizona
HeartInstitute,(1993),152.
RVSP=4*(VmaxTR)
2
+RAP
where: RAP=RightAtrialPressure
S/D
Reynolds,Terry.TheEchocardiographer’sPocket
Reference.2nded.,SchoolofCardiacUltrasound,
ArizonaHeartInstitute,(2000),217.
Svelocity/Dvelocity
where: Svelocity=PulmonaryveinSwave
Dvelocity=PulmonaryveinDwave
Stroke Index (SI) in cc/m
2
Mosby’sMedical,Nursing,&AlliedHealth
Dictionary,4thed.,(19 94),1492.
SI=SV/BSA
where: SV=StrokeVolume
BSA=BodySurfaceArea
Stroke Volume (SV) Doppler in ml
Oh,J.K.,J.B.Seward,A.J.Tajik.TheEchoManual.
2nded.,Lippincott,Williams,andWilkins,
(1999),40,59,62 .
SV=(CSA*VTI)
where CSA=CrossSectionalAreaofthe
orifice(LVOTarea)
VTI=VelocityTimeIntegralofthe
aorticvalve
Tricuspid Valve Area (TVA)
Reynolds,Terry.TheEchocardiographer’sPocket
Reference.2nded.,School ofCardiacUltrasound,
ArizonaHeartInstitute,(2000),55,391,452.
TVA=220/PHT
Stroke Volume (SV) 2D and M Mode in ml
Oh,J.K.,J.B.Seward,A.J.Tajik.TheEchoManual.
2nded.,Boston:Little,BrownandCompany,
(1994),44.
SV=(LVEDV–LVESV)
where: SV=StrokeVolume
LVEDV=EndDiastolicVolume
LVEDSV=EndSystolicVolume
Velocity Time Integral (VTI) in cm
Reynolds,Terry.TheEchocardiographer’sPocket
Reference.2nded.,School ofCardiacUltrasound,
ArizonaHeartInstitute,(2000),383.
VTI=sumofabs(velocities[n])
where: AutoTrace–distance(cm)blood
travelswitheachejectionperiod.
Velocitiesareabsolutevalues.
Obstetrical references
Amniotic Fluid Index (AFI)
Jeng,C.J.,etal.“Am n io ti cFluidIndex
MeasurementwiththeFourQuadrantTechnique
DuringPregnancy.”TheJournalofReproductive
Medicine,35:7(July1990), 674‐677.
Average Ultrasound Age (AUA)
ThesystemprovidesanAUAderivedfromthe
componentmeasurementsfromthe
measurementtables.
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