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Myocardial Performance Index (RV) - Tei Index

Calculation


TCOT ms
RVET ms


RV MPI
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Information

RV MPI Abnormal Values

Abnormal
Pulsed Doppler RV MPI >0.40
Tissue Doppler RV MPI >0.55

RV MPI

Also known as RIMP or Tei index. It is an index that incorporates both systolic and diastolic time intervals in expressing global systolic and diastolic ventricular function. The RV MPI has prognostic value among pulmonary hypertension patients at a single point in time and changes in this index correlate with change in clinical status. It also been used in studying patients with RV infarction, hypertrophic cardiomyopathy, and congenital heart disease, etc.

The RV MPI can be obtained by two methods:

  1. Pulsed Doppler method
  2. Tissue Doppler method

The tissue Doppler method allows for measurement for MPI as well as S', E', and A', all from a single image.

RV MPI =
IVCT + IVRT
RVET
=
TCOT - RVET
RVET

Variable Definition
Input
TCOT Tricuspid Valve Closure to Opening Time (ms)
RVET RV Ejection time (ms)
Output
RV MPI Myocardial Performance Index

References

Rudski LG, et al. Guidelines for the echocardiographic assessment of the right heart in adults: a report from the American Society of Echocardiography. J Am Soc Echocardiogr. 2010 Jul;23(7):700-1.
Tei C, Dujardin KS, Hodge DO, et al. Doppler echocardiographic index for assessment of global right ventricular function. J Am Soc Echocardiogt 1996;9:838-847.
Oh JK, et al. The Echo Manual. 2nd ed. p. 55, 1999.
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Author: Dr. Chi-Ming Chow Developer: Edward Brawer Illustrator: Ellen Ho
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