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Related Concept Videos

Fetal Circulation01:14

Fetal Circulation

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Fetal circulation is a unique system that facilitates the exchange of gases, nutrients, and waste products between the developing fetus and the mother. This intricate process takes place through a special organ called the placenta.
Two umbilical arteries transport blood from the fetus to the placenta. At the placenta, the blood absorbs oxygen and nutrients while simultaneously eliminating waste products. This oxygen-enriched and nutrient-rich blood then returns to the fetus through one...
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Updated: Jul 29, 2025

Fetal Mouse Cardiovascular Imaging Using a High-frequency Ultrasound 30/45MHZ System
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A Small Scale Optically Pumped Fetal Magnetocardiography System.

David Wurm1, Peter Ewert2, Peter Fierlinger1

  • 1Chair E66, School of Natural Sciences, Technical University of Munich, 80636 Munich, Germany.

Journal of Clinical Medicine
|May 27, 2023
PubMed
Summary
This summary is machine-generated.

A new optically pumped magnetometer (OPM)-based fetal magnetocardiography (fMCG) system offers a practical and patient-friendly approach for diagnosing fetal arrhythmias. This OPM-fMCG system provides high-quality fetal cardiac rhythm data comparable to traditional methods.

Keywords:
MSROPMcardiac time intervalsfMCGfetal arrhythmialow costperson-size shields

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Area of Science:

  • Biomedical Engineering
  • Cardiology
  • Medical Physics

Background:

  • Fetal magnetocardiography (fMCG) is the leading diagnostic technique for fetal arrhythmia, surpassing fetal electrocardiography and cardiotocography.
  • Combining fMCG with fetal echocardiography enhances the comprehensive evaluation of fetal cardiac rhythm and function.
  • Optically Pumped Magnetometers (OPMs) offer a novel approach for developing practical fMCG systems.

Purpose of the Study:

  • To demonstrate a practical fetal magnetocardiography (fMCG) system utilizing optically pumped magnetometers (OPMs).
  • To assess the feasibility and performance of an OPM-based fMCG system in pregnant women.
  • To establish a patient-friendly and accessible fMCG system for research and clinical applications.

Main Methods:

  • Seven pregnant women underwent fMCG using an OPM-based system within a person-sized magnetic shield.
  • The OPM-fMCG system was designed for patient comfort, allowing a prone position with easy access.
  • Data quality was compared to recordings made in a conventional shielded room.

Main Results:

  • The OPM-based fMCG system demonstrated no significant loss of data quality compared to shielded room recordings.
  • Standard cardiac time intervals were measured: PR = 104 ± 6 ms, QRS = 52.6 ± 1.5 ms, and QTc = 387 ± 19 ms.
  • These cardiac intervals are consistent with previously published data from SQUID-based fMCG systems.

Conclusions:

  • This study presents the first European OPM-based fMCG device for pediatric cardiology research.
  • The developed OPM-fMCG system is patient-friendly, comfortable, and open, facilitating wider accessibility.
  • Consistent cardiac interval measurements validate the OPM technology for fetal cardiac assessment, paving the way for broader clinical adoption.