An Eigenfilter Based Approach for Extraction of Fetal Heart Signals under Noisy Conditions Using Adaptive Filters

2012 ◽  
Author(s):  
Wijayamuni N.M. Soysa ◽  
Roshan I. Godaliyadda ◽  
Janaka V. Wijayakulasooriya ◽  
Mervyn P.B. Ekanayake ◽  
Iresh C. Kandauda
Keyword(s):  
Adaptive Filters ◽  
Fetal Heart ◽  
Noisy Conditions

scholarly journals Fetal Heart Rate Extraction using NLMS Algorithm

2021 ◽  
Vol 15 ◽  
pp. 61-67
Author(s):  
Ricky K. ◽  
Arjuna M ◽  
Sadegh Aminifar
Keyword(s):  
Heart Rate ◽  
Fetal Heart Rate ◽  
Adaptive Filters ◽  
Fetal Heart ◽  
Reference Signal ◽  
Least Mean Square ◽  
Fetal Electrocardiogram ◽  
Non Invasive ◽  
Rr Interval ◽  
Nlms Algorithm

This project develops a fetal heart rate (FHR) extraction application to analyze the fetus activity in the mother uterus. Several methods are available that can be used to detect FHR such as using the fetal electrocardiogram (FECG) that generated by fetus’ heart. Extracting FECG signals is considered a major challenge while the fetus is inside the mother uterus. Normalized Least Mean Square (NLMS) algorithm is one of adaptive filters that is chosen as adaptive filter to get FECG. Pan Tompkins algorithm is used for tracking R-peaks of heartbeat pulses of FECG signal. After detecting the RR interval a formula is used to calculate the bpm (heartbeat per minute) of FECG. Abdominal and direct FECG (ADFECG) database will be used to evaluate the implemented techniques as it has reference signal. At the end of research, calculated FHR is varied from 125.4 bpm to 130.3 bpm. When comparison is done between abdominal ECG (AECG) and direct FECG (DFECG), the error of FHR is 0.1%. The accuracy of R-peaks extraction is 100% where all R-peaks are detected by implemented techniques. MATLAB is used for signal simulations. This system will have ability to interpret the non-invasive FECG (NIFECG) database and compute its FHR.

Ultrastructural alterations in the fetal mouse myocardium in response to genetic and environmental factors

1987 ◽  
Vol 45 ◽  
pp. 724-725
Author(s):  
K.C. Feng-Chen ◽  
F.B. Essien ◽  
K.J. Prestwidge ◽  
J.T. Cheng ◽  
C.L. Shen
Keyword(s):  
Fetal Heart ◽  
Perinatal Period ◽  
Primary Energy ◽  
Cardiac Contraction ◽  
Ultrastructural Changes ◽  
Fetal Mouse ◽  
The Subject ◽  
Physiological Adjustments ◽  
Genetic And Environmental Factors ◽  
Genetically Determined

The physiology of the fetal heart differs significantly from that of the mature post-natal organ: e.g., the metabolic supply for adult cardiac contraction relies mainly on fatty acids; whereas, the fetal heart uses carbohydrates as its primary energy source. Limited morphological descriptions of the developing myocardium have appeared. However, additional studies are required to elucidate the ultrastructural changes occuring in the perinatal period when enormous physiological adjustments are made. Although adult animals are most often used in toxocological and pathological analyses, it is also important to investigate fetal cardiac responsiveness to various agents. The vulnerability of the ultrastructure of the fetal mouse myocardium to genetic and environmental assault is the subject of this report. The genetically determined effect on the heart was observed in mouse embryos homozygous for the cab (cardiac abnormality) mutation discovered by Essien.

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