title: Evaluation of the performance of a QRS detector for extracting the heart interbeat RR time series from fetal magnetocardiography.
abstract: Fetal magnetocardiography is a useful technique for non-invasive diagnostics of the electrophysiological activity of the fetal heart. The purpose of this study was to acquire fetal magnetocardiograms (FMCG) in a magnetically shielded environment as well as in a high-frequency noise environment, implement a QRS detection algorithm, and evaluate its performance. The FMCG were recorded over a period of 5 minutes at several sensor locations above the pregnant abdomen by second-order SQUID gradiometers. Quantitative analysis of FMCG with normal pregnancies and gestational ages 26-35 weeks showed improved QRS detection performance with signal pre-processing and parameter tuning.
authors.affiliation: Texas Center for Superconductivity & Adv. Mater., Houston Univ., TX, USA.
authors.forename: A
authors.initials: A
authors.lastname: Brazdeikis
authors.forename: A K
authors.initials: AK
authors.lastname: Guzeldere
authors.forename: N S
authors.initials: NS
authors.lastname: Padhye
authors.forename: M T
authors.initials: MT
authors.lastname: Verklan