# [Glossary] PW mode measurement

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• [Glossary] PW mode measurement

The glossary of “Auto Measure”

• HR (bpm)ļ¼Heart rate
• PSV (cm/s)ļ¼Peak systolic velocity
• EDV (cm/s)ļ¼End diastolic velocity
• PIļ¼Pulsatility index (of Gosling)
• PI = (PSVāEDV)/MV
• MV (cm/s)ļ¼Mean velocity
• RIļ¼Resistance index (of Pourcelot)
• RI = (PSVāEDV)/PSV
• VTI (cm)ļ¼Velocity-time integral
• TAV Max (cm/s)ļ¼The maximum of time-averaged velocity
• S/Bļ¼The average RI of a cycle
• SDļ¼Systolic/Diastolic Ratio
• SD = PSV/EDV
• ACCL (cm/sĀ²)ļ¼The acceleration index
• ACCL = (PSV ā EDV)/ACCT
• ACCT (s)ļ¼The time from the lowest (EDV) to the highest (PSV)
• VFM (ml/min)ļ¼Volume flow per minute
• VFM Max (ml/min)ļ¼The maximum of volume flow per minute
• Diam (mm) ļ¼Diameter

ā VFM, VFM Max, Diam values will be shown when you are in the frozen state.

The glossary of measure tool “PW V, T, HR”

• T (s)ļ¼Time
• HR (bpm)ļ¼Heart rate
• Range (cm/s)ļ¼The range of flow velocity

The glossary of measure tool “RI, S/D”

• PSV (cm/s)ļ¼Peak systolic velocity
• EDV (cm/s)ļ¼End diastolic velocity
• S/Dļ¼Systolic/Diastolic Ratio
• SD = PSV/EDV
• RIļ¼Resistance index (of Poucelot)
• RI = (PSVāEDV)/PSV

The glossary of measure tool “PI”

• PSV (cm/s)ļ¼Peak systolic velocity
• D (cm/s)ļ¼End diastolic velocity
• Area (cmĀ²)ļ¼Blood vessel cross-sectional area
• Diam (mm)ļ¼Diameter
• PIļ¼Pulsatility index (of Gosling)
• PI = (PSVāEDV)/MV
• MV (cm/s)ļ¼Mean velocity
• VFM Max (ml/min)ļ¼The maximum of volume flow per minute
• TAV Max (cm/s)ļ¼The maximum of time-averaged velocity

The glossary of measure tool “VTI”

• VTI (cm)ļ¼Velocity-time integral

The glossary of measure tool “E/A Ratio”

• E Vel. (cm/s): E wave velocity
• A Vel. (cm/s): A wave velocity
• E/A Ratio: Ratio of E- to A-wave velocities
• DT (ms): Deceleration time, early filling velocity, time interval from peak E-wave along the slope of LV filing extrapolated to the zero-velocity baseline.
• DT Slope (cm/sĀ²): Deceleration Slope