This clinical white paper introduces MPI+, a Samsung-developed tool that automates the measurement of the Fetal Right Ventricular Myocardial Performance Index (RV MPI) using fetal heart ultrasound and pulsed-wave Doppler imaging. Accurate assessment of fetal cardiac function, particularly right ventricular function, is crucial in identifying conditions like intrauterine growth restriction and twin-to-twin transfusion syndrome.
In this prospective study, 70 normal singleton pregnancies between 20 and 24 weeks of gestation were examined using HERA W10 ultrasound systems. MPI+ works by automatically synchronizing RV inflow and outflow waveforms using pulmonary valve closure clicks and calculating the Mod-MPI, including its components: isovolumetric contraction time (ICT), isovolumetric relaxation time (IRT), and ejection time (ET).
Compared to manual measurement, MPI+ demonstrated superior intra- and inter-operator reproducibility. The automated approach reduced operator dependency and minimized variability, making MPI+ a reliable solution for routine clinical use. By streamlining the process, MPI+ allows practitioners—even those less familiar with fetal cardiac function analysis—to accurately measure the fetal RV MPI using standard fetal heart ultrasound.
This automation represents a significant step forward in fetal echocardiography by providing clinicians with reproducible, consistent data that supports early diagnosis and monitoring of fetal cardiac health.
To learn how to access and use this feature, refer to our Quick Guide to RV MPI .
