Fetal left modified myocardial performance index: technical refinements in obtaining pulsed‐Doppler waveforms

Objective To assess the influence of machine settings (wall motion filter (WMF), angle of insonation, Doppler aliasing) and phase of valve clicks on repeatability of measurement of the fetal left modified myocardial performance index (Mod‐MPI). Methods Fetal left Mod‐MPI was evaluated prospectively in 157 morphologically normal fetuses at 19–36 weeks' gestation. In a baseline cohort, a previously published technique and settings were used for...