NCIt 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.;
Alternative definition : CDISC: A calculated result that uses the following base formula to quantify both systolic
and diastolic ventricular function: MPI (IVCT IVRT)/VET, where IVCT is isovolumetric
contraction time, IVRT is isovolumetric relaxation time, and VET is ventricular ejection
time.;