Myocardial Performance Index

**Semantic type:** Finding

**Definition:** A calculated result that uses the following formula to quantify both systolic and diastolic ventricular function: MPI = IVCT + IVRT) / V ET, in which IVCT is isovolumetric contraction time, IVRT is isovolumetric relaxation time, and V ET is ventricular ejection time.

**Synonyms:** - MPI