Adaptive filter application in fetal electrocardiography

A hybrid adaptive algorithm for canceling the maternal electrocardiogram (MECG) component in abdominal fetal electrocardiography (FECG) is described. Three limb (1,2,3) lead ECG recordings and one abdominal ECG recording are taken from 6 pregnant women. The three limb ECG recordings are orthogonalized through the Gram-Schmidt procedure, and are input to a multichannel adaptive filter. After processing by the adaptive algorithm, these three orthogonal ECG recordings will be put together to simulate the MECG component in the abdominal FECG. The ideal output of the hybrid adaptive filter will be an MECG-component-free fetal ECG signal, which can provide valuable clinical data to the obstetrician.<<ETX>>

[1]  Piet Bergveld,et al.  Real-Time Fetal ECG Recording , 1986, IEEE Transactions on Biomedical Engineering.

[2]  F Clewlow,et al.  Variation in the T/QRS ratio of fetal electrocardiograms recorded during labour in normal subjects , 1989, British journal of obstetrics and gynaecology.

[3]  B. Widrow,et al.  The time-sequenced adaptive filter , 1981 .

[4]  V D Saini,et al.  Computerized detection of low-level fetal signals in the maternal abdominal electrocardiogram. , 1985, Computers in biology and medicine.

[5]  D L Kirk,et al.  Can fetal electrocardiography improve the prediction of intrapartum fetal acidosis? , 1986, British journal of obstetrics and gynaecology.

[6]  J. Vandewalle,et al.  Multichannel adaptive enhancement of the electrogastrogram , 1990, IEEE Transactions on Biomedical Engineering.

[7]  Earl R. Ferrara,et al.  Fetal Electrocardiogram Enhancement by Time-Sequenced Adaptive Filtering , 1982, IEEE Transactions on Biomedical Engineering.

[8]  H. Jenkins.  Technical progress in fetal electrocardiography--a review. , 1986, Journal of perinatal medicine.

[9]  B. Widrow,et al.  Multichannel adaptive filtering for signal enhancement , 1981 .

[10]  M Macklin,et al.  Changes in the conduction of the fetal electrocardiogram to the maternal abdominal surface during gestation. , 1977, American journal of obstetrics and gynecology.

[11]  Joos Vandewalle,et al.  Two Methods for Optimal MECG Elimination and FECG Detection from Skin Electrode Signals , 1987, IEEE Transactions on Biomedical Engineering.

[12]  J. H. van Bemmel,et al.  Detection of Weak Foetal Electrocardiograms by Autocorrelation and Crosscorrelation of Envelopes , 1968 .

[13]  V T Rhyne,et al.  A digital system for enhancing the fetal electrocardiogram. , 1969, IEEE transactions on bio-medical engineering.

[14]  J. Vandewalle,et al.  An adaptive on-line method for the extraction of the complete fetal electrocardiogram from cutaneous multilead recordings , 1986, Journal of perinatal medicine.

[15]  J. Glover.  Adaptive noise canceling applied to sinusoidal interferences , 1977 .

[16]  D. L. Kirk,et al.  Can fetal electrocardiography improve the prediction of intraparturn fetal acidosis? , 1986 .

[17]  Symonds Em.  Fetal electrocardiographic monitoring: past, present and future--a historical perspective. , 1986 .

[18]  M. Nageotte,et al.  Fetal heart rate monitoring , 1997, Springer Berlin Heidelberg.

[19]  R. L. Longini,et al.  Near-Orthogonal Basis Functions: A Real Time Fetal ECG Technique , 1977, IEEE Transactions on Biomedical Engineering.

[20]  Piet Bergveld,et al.  A New Technique for the Suppression of the MECG , 1981, IEEE Transactions on Biomedical Engineering.

[21]  B. Widrow,et al.  Adaptive noise cancelling: Principles and applications , 1975 .

[22]  W. H. Huggins,et al.  The Intrinsic Component Theory of Electrocardiography , 1962 .

[23]  R.F. Santopietro.  The origin and characterization of the primary signal, noise, and interference sources in the high frequency electrocardiogram , 1977, Proceedings of the IEEE.

[24]  R L Longini,et al.  A noninvasive extraction of the fetal electrocardiogram. , 1977, Computers and biomedical research, an international journal.

[25]  B. Widrow,et al.  Stationary and nonstationary learning characteristics of the LMS adaptive filter , 1976, Proceedings of the IEEE.

[26]  Allan R. Hambley,et al.  The Use of Intrinsic Components in an ECG Filter , 1974 .