Separation of the fetal heart signal in a synchronous network consisting of maternal and fetal hearts

This paper studies the heart oscillation model to separate fetal ECG from maternal ECG based on abdominal recordings. To this end, two phases are designed. A modified version of the Duffing-Van der Pol oscillator is considered a computational heart model at the modeling phase. To evaluate the effect of the interaction between maternal and fetal hearts as well as the differences and features of the fetal heart structure, the fetal heart model is modified based on the maternal heart model. A non-identical network is employed as an interactive network of the maternal and fetal hearts. Then, the degree of network synchronization is measured using a pattern synchronization index of the nonidentical network. An attempt is made to separate the fetal signal from the maternal signal in abdominal signals at the separation phase. Two problem-solving approaches are explained: the step-by-step mode that calculates the signal at any given moment and the construction of general equations. These approaches are used to calculate the variables, including maternal and fetal signals, making it possible to separate the maternal ECG from fetal one. (c) 2023 Sharif University of Technology. All rights reserved.