Tei Myocardial Performance Index (MPI)
Tei myocardial performance index (Tei 1995): (isovolumic contraction + isovolumic relaxation time) / ejection time; a higher index marks worse combined systolic-diastolic function.
Open the calculator → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- Isovolumic contraction time
- 80 ms
- Isovolumic relaxation time
- 90 ms
- Ejection time
- 250 ms
Result: Tei index 0.68 — above the LV normal band (~0.39 ± 0.05): worse combined function.
The tool opens with these values already filled in. Replace them with your own.
What the result means
- Reference
- LV normal ~0.39 ± 0.05, RV normal ~0.28 ± 0.04; higher = worse; > 1.14 flags poor prognosis in severe LV dysfunction.
What you enter
- Isovolumic contraction time (IVCT)
- Isovolumic relaxation time (IVRT)
- Ejection time (ET)
How this is calculated
- Formula
- MPI = (IVCT + IVRT) / ET = (a − b) / b.
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. J Cardiol. 1995;26(6):357-366. Read the source ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.