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Myocardial Performance Index (LV) - Tei Index

Calculation


MCOT ms
LVET ms


LV MPI
Normal 0.39 ±0.05
Dilated cardiomyopathy 0.59 ±0.10
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Information

Also known as the Tei index. It is an index that incorporates both systolic and diastolic time intervals in expressing global systolic and diastolic ventricular function. Systolic dysfunction prolongs prejection (isovolumic contraction time, IVCT) and a shortening of the ejection time (ET). Both systolic and diastolic dysfunction result in abnormality in myocardial relaxation which prolongs the relaxation period (isovolumic relaxation time, IVRT).

LV MPI =
IVCT + IVRT
LVET
=
MCOT - LVET
LVET

Variable Definition
Input
MCOT Mitral Valve Closure to Opening Time (ms)
LVET LV Ejection time (ms)
Output
LV MPI LV Myocardial Performance Index
Normal 0.39 ±0.05
Dilated cardiomyopathy 0.59 ±0.10

References


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