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  <h1>Non-Invasive Fetal ECG Arrhythmia Database</h1>

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    <strong>Creator:</strong> Joachim Behar<br>

    <strong>Published:</strong> Feb. 19, 2019 &nbsp;&nbsp; <strong>Version:</strong> 1.0.0

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  <h2>Citation</h2>

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    When using this resource, please cite the original publication:<br>

    Behar JA, Bonnemains L, Shulgin V, Oster J, Ostras O, Lakhno I. 

    <em>Noninvasive fetal electrocardiography for the detection of fetal arrhythmias</em>. 

    Prenatal Diagnosis, 2019 Jan 2.

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  <p>

    Please include the standard citation for PhysioNet: (show more options)<br>

    Goldberger, A., Amaral, L., Glass, L., Hausdorff, J., Ivanov, P. C., Mark, R., ... & Stanley, H. E. (2000). 

    <em>PhysioBank, PhysioToolkit, and PhysioNet: Components of a new research resource for complex physiologic signals</em>. 

    Circulation [Online]. 101 (23), pp. e215–e220.

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  <h2>Introduction</h2>

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    Fetal cardiac arrhythmias are defined as any irregular fetal cardiac rhythm or a regular rhythm at a rate outside the reference range of 100 to 200 beats per minute (bpm). Arrhythmias are discovered in about 1% of fetuses, with approximately 10% of these being potential sources of morbidity. Although most fetal arrhythmias are benign, some can cause fetal hydrops and lead to fetal death. This means that up to 1 in 100 fetuses may need their arrhythmias to be closely monitored and, if indicated, treated in-utero using antiarrhythmic therapy.

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    The Non-Invasive Fetal ECG Arrhythmia Database (NIFEA DB) provides a series of fetal arrhythmia recordings (n=12) and a number of control normal rhythm recordings (n=14) performed using the non-invasive fetal electrocardiography (NI-FECG) technique.

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  <h2>Data Description</h2>

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    For each recording, a set of four or five abdominal channels and one maternal chest channel were recorded. The sampling frequency was 500 Hz or 1 kHz, as indicated in the header of each file. Detailed diagnostic information and the gestational age of each fetus can be found in the associated publication.

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    Recordings are named using the following convention:

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    <li><strong>ARR:</strong> arrhythmia fetus.</li>

    <li><strong>NR:</strong> normal rhythm fetus.</li>

    <li>The mention "chest" corresponds to the single-lead maternal chest ECG.</li>

    <li>The mention "abdominal" corresponds to the 4–5 raw abdominal channels.</li>

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  <h2>Contributors</h2>

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    This data was contributed by: Joachim A. Behar, Laurent Bonnemains, Vyacheslav Shulgin, Julien Oster, Oleksii Ostras, and Igor Lakhno.

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  <h2>Contact</h2>

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    For further information, please contact:<br>

    <strong>Name:</strong> Joachim Behar<br>

    <strong>Affiliation:</strong> Technion – Israel Institute of Technology<br>

    <strong>Email:</strong> <a href="mailto:joachim.a.behar@gmail.com">joachim.a.behar@gmail.com</a>

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