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Posts Tagged ‘What is the unit for TVI ? Echocardiography’

TVI  (or VTI)  is a hemo-dynamic  echo parameter measured from Doppler spectrum  across the valves ,usually in the outflow.This parameter is used to calculate cardiac output .VTI times the cross sectional area gives the stroke volume.

 

time velocity Integral  TVI

A correction: TVI is multiplication of velocity into time not division as suggested in the cartoon   

Time velocity Integral

What is time velocity integral  TVI echocardiography

Summary

*VTI is a Doppler parameter described in cm , it can be referred to as Stroke distance.This stroke distance when multiplied by  valve area gives the stroke volume from LV/RV  (or flow volume across AV valves or through any conduit)

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