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dc.contributor.authorMarzbanrad, F
dc.contributor.authorKhandoker, AH
dc.contributor.authorKimura, Y
dc.contributor.authorPalaniswami, M
dc.contributor.authorClifford, GD
dc.date.accessioned2021-02-04T01:59:01Z
dc.date.available2021-02-04T01:59:01Z
dc.date.issued2017-05-17
dc.identifier.citationMarzbanrad, F., Khandoker, A. H., Kimura, Y., Palaniswami, M. & Clifford, G. D. (2017). Assessment of Fetal Development Using Cardiac Valve Intervals. FRONTIERS IN PHYSIOLOGY, 8 (MAY), https://doi.org/10.3389/fphys.2017.00313.
dc.identifier.issn1664-042X
dc.identifier.urihttp://hdl.handle.net/11343/259539
dc.description.abstractAn automated method to assess the fetal physiological development is introduced which uses the component intervals between fetal cardiac valve timings and the Q-wave of fetal electrocardiogram (fECG). These intervals were estimated automatically from one-dimensional Doppler Ultrasound and noninvasive fECG. We hypothesize that the fetal growth can be estimated by the cardiac valve intervals. This hypothesis was evaluated by modeling the fetal development using the cardiac intervals and validating against the gold standard gestational age identified by Crown-Rump Length (CRL). Among the intervals, electromechanical delay time, isovolumic contraction time, ventricular filling time and their interactions were selected in a stepwise regression process that used gestational age as the target in a cohort of 57 fetuses. Compared with the gold standard age, the newly proposed regression model resulted in a mean absolute error of 3.8 weeks for all recordings and 2.7 weeks after excluding the low quality recordings. Since Fetal Heart Rate Variability (FHRV) has been proposed in the literature for assessing the fetal development, we compared the performance of gestational age estimation by our new valve-interval based method, vs. FHRV, while assuming the CRL as the gold standard. The valve interval-based method outperformed both the model based on FHRV. Results of evaluation for 30 abnormal cases showed that the new method is less affected by arrhythmias such as tachycardia and bradycardia compared to FHRV, however certain types of heart anomalies cause large errors (more than 10 weeks) with respect to the CRL-based gold standard age. Therefore, discrepancies between the regression based estimation and CRL age estimation could indicate the abnormalities. The cardiac valve intervals have been known to reflect the autonomic function. Therefore the new method potentially provides a novel approach for assessing the development of fetal autonomic nervous system, which may be growth curve independent.
dc.languageEnglish
dc.publisherFRONTIERS MEDIA SA
dc.rights.urihttps://creativecommons.org/licenses/by/4.0
dc.titleAssessment of Fetal Development Using Cardiac Valve Intervals
dc.typeJournal Article
dc.identifier.doi10.3389/fphys.2017.00313
melbourne.affiliation.departmentElectrical and Electronic Engineering
melbourne.affiliation.facultyEngineering and Information Technology
melbourne.source.titleFrontiers in Physiology
melbourne.source.volume8
melbourne.source.issueMAY
melbourne.identifier.arcLP100200184
dc.rights.licenseCC BY
melbourne.elementsid1214902
melbourne.contributor.authorPalaniswami, Marimuthu
melbourne.contributor.authorKHANDOKER, AHSAN
dc.identifier.eissn1664-042X
melbourne.identifier.fundernameidAustralian Research Council, LP100200184
melbourne.accessrightsOpen Access


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