Full Text Journal Articles by
Author William Lutter

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Low-Cost Fetal Magnetocardiography: A Comparison of Superconducting Quantum Interference Device and Optically Pumped Magnetometers.

Sarah Strand, William Lutter, Janette F Strasburger, Vishal Shah, Oswaldo Baffa, Ronald T Wakai,

Background Fetal magnetocardiography (fMCG) is a highly effective technique for evaluation of fetuses with life-threatening arrhythmia, but its dissemination has been constrained by the high cost and complexity of Superconducting Quantum Interference Device (SQUID) instrumentation. Optically pumped magnetometers (OPMs) are a promising new technology that can replace SQUIDs for many applications. ... Read more >>

J Am Heart Assoc (Journal of the American Heart Association)
[2019, 8(16):e013436]

Cited: 0 times

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Fetal QT Interval Estimation Using Sequential Hypothesis Testing.

Suhong Yu, Barry D Van Veen, William J Lutter, Ronald T Wakai,

Objective: Recent studies utilizing fetal magnetocardiography have demonstrated the efficacy of corrected QT interval (QTc) measurement for in utero diagnosis and prognosis of long QT syndrome, a leading cause of sudden death in early life. The objective of the study was to formulate and test a novel statistical estimation method ... Read more >>

IEEE Trans Biomed Eng (IEEE transactions on bio-medical engineering)
[2017, 64(11):2704-2710]

Cited: 0 times

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Fetal Atrial Flutter: Electrophysiology and Associations With Rhythms Involving an Accessory Pathway.

Annette Wacker-Gussmann, Janette F Strasburger, Sharda Srinivasan, Bettina F Cuneo, William Lutter, Ronald T Wakai,

BACKGROUND:Atrial flutter (AFl) accounts for up to one third of all fetal tachyarrhythmias and can result in premature delivery, hydrops, and fetal death in 10% of cases; however, the electrophysiology of AFl in utero is virtually unstudied. METHODS AND RESULTS:In this observational study, we reviewed 19 fetal magnetocardiography studies from ... Read more >>

J Am Heart Assoc (Journal of the American Heart Association)
[2016, 5(6):]

Cited: 2 times

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Independent component analysis of normal and abnormal rhythm in twin pregnancies.

Nana Aba Mensah-Brown, William J Lutter, Silvia Comani, Janette F Strasburger, Ronald T Wakai,

We investigated the utility of ICA for evaluation of fetal rhythm in five uncomplicated twin pregnancies and in five twin pregnancies complicated by fetal arrhythmia. Using objective and subjective criteria, we sought to determine how the signal-to-noise ratio, signal fidelity and interference rejection are affected when synthesizing the fetal signal ... Read more >>

Physiol Meas (Physiological measurement)
[2011, 32(1):51-64]

Cited: 2 times

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Indices and detectors for fetal MCG actography.

William J Lutter, Ronald T Wakai,

Several recent studies have demonstrated the usefulness of fetal magnetocardiogram (fMCG) actography, a relatively new method of detecting fetal movement that can be performed in conjunction with fMCG assessment of fetal heart rate and rhythm. In this study, we formulate indices of fetal activity that incorporate information from all channels ... Read more >>

IEEE Trans Biomed Eng (IEEE transactions on bio-medical engineering)
[2011, 58(6):1874-1880]

Cited: 3 times

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Matched-filter template generation via spatial filtering: application to fetal biomagnetic recordings.

Ronald T Wakai, William J Lutter,

We have developed a two-step procedure for signal processing of fetal biomagnetic recordings that removes cardiac interference and noise. First, a modified matched filter (MF) is applied to remove maternal cardiac interference; then, a simple signal space projection (SSP) is applied to remove noise. The key difference between our MF ... Read more >>

IEEE Trans Biomed Eng (IEEE transactions on bio-medical engineering)
[2002, 49(10):1214-1217]

Cited: 6 times

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