Influence of equipment and settings on myocardial performance index repeatability and definition of settings to achieve optimal reproducibility

Objectives: Myocardial performance index (MPI) is increasingly used in fetal medicine research, but wide variations in normal values are still reported. The aim of this study was to compare left MPI values and reproducibility using different settings and ultrasound equipment in order to standardize optimal machine settings. Methods: Left MPI was prospectively evaluated performing conventional Doppler in 62 fetuses (28 to 36 weeks) using different settings (changing sweep speed, gain and wall motion filter (WMF)) and two different ultrasound devices (Siemens Antares, Siemens; Voluson E8, General Electric). Intrac…