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:
Pulsed Doppler method
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
TCOT - RVET
Tricuspid Valve Closure to Opening Time (ms)
RV Ejection time (ms)
Myocardial Performance Index
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