EchocardiographyExercise StressMiscEchocardiography
Aortic Valve Velocity RatioLV EF (Modified Quinones Equation)Myocardial Performance Index (RV)
AVA (Continuity Equation VTI)LV EF (Simplified Quinones Equation)PCWP by E/Ea (Nagueh Formula)
AVA (Continuity Equation VMax)LV Fractional ShorteningPISA (Mitral regurgitation)
dP/dt (LV contractility)LV Mass and LV Mass IndexPISA (Mitral stenosis)
dP/dt (RV contractility)Mitral valve area (PHT)Qp/Qs
Left atrial pressure (MR)Mitral Valvuloplasty Score (MGH)RVSP (TR)
LA Volume (Biplane Method)Modified Bernoulli EquationStroke Volume, Cardiac Output
LV EF (Dumesnil Method)Myocardial Performance Index (LV)
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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

Tei C, Ling LH, Hodge DO, et al. New index of combined systolic and diastolic myocardial performance: a simple and reproducible measure of cardiac function - a study in normals and dilated cardiomyopathy. J Cardiol 1995;26:357-366.
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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