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Related Concept Videos

Electrocardiogram01:29

Electrocardiogram

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An electrocardiogram (ECG or EKG) is a critical diagnostic tool that records the electrical signals produced by the heart during each heartbeat. This recording is achieved through electrodes placed strategically on the arms, legs, and chest. The electrocardiograph amplifies these signals and produces 12 distinct tracings, offering a comprehensive understanding of the heart's electrical activity.
Three major waveforms are present in a typical ECG recording: the P wave, the QRS complex, and...
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Pulse rhythm01:30

Pulse rhythm

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Pulse rhythm refers to the pattern of pulsations within specific intervals, offering valuable insights into the regularity or irregularity of the heart's beats as observed through the pattern of pulsation within specific intervals. A regular pulse exhibits a consistent heart rate with uniform waveforms and pulsation force, variations of which can be classified as normal, weak, or bounding.
Conversely, an irregular pulse pattern is termed dysrhythmia, stemming from disruptions in cardiac...
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Related Experiment Video

Updated: Apr 4, 2026

Author Spotlight: Advancing the Study of Brain-Heart Interplay with a Comprehensive EEGLAB Plugin for Multimodal Signal Analysis
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Prospective Clinical Testing of a "Beat-To-Beat" Extraction Method for Fetal Electrocardiography.

Anita Krishnan1,2, Pooneh Roshanitabrizi3, Anqing Zhang4

  • 1Department of Cardiology, Children's National Hospital, Washington, District of Columbia, USA, akrishna@childrensnational.org.

Fetal Diagnosis and Therapy
|April 2, 2026
PubMed
Summary

A new fetal electrocardiography (fECG) system shows feasibility for ambulatory monitoring. The system successfully extracts fetal cardiac time intervals (fCTI) in 63% of pregnancies, advancing remote fetal health assessment.

Keywords:
Cardiac time intervalElectrocardiographyFetal arrhythmiaSignal processing

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Area of Science:

  • Biomedical Engineering
  • Maternal-Fetal Medicine
  • Cardiology

Background:

  • Clinical need for ambulatory fetal electrocardiography (fECG) remains unmet.
  • Novel fECG system developed using custom hardware and null coherence signal processing.
  • Evaluated feasibility in normal and at-risk pregnancies.

Purpose of the Study:

  • Assess the feasibility of a novel ambulatory fECG system.
  • Determine the system's effectiveness in extracting fECG signals.
  • Evaluate the measurement of fetal cardiac time intervals (fCTI).

Main Methods:

  • Applied fECG system to 43 patients (25 normal, 18 abnormal fetuses).
  • 15-minute recordings using 12-24 electrodes and 1 ground.
  • Real-time and post-processing signal analysis; blinded clinician grading (5-point scale).

Main Results:

  • Successful time-resolved fECG separation in 70% (30/43) of subjects.
  • Median quality grading of ≥3 in 60% (26/43) of graded studies.
  • Measurable fCTI achieved in 63% (27/43) of cases; reduced signal quality noted with BMI ≥ 30 and during 25-32 weeks gestation.

Conclusions:

  • Demonstrated feasibility of ambulatory fECG across gestation.
  • Enabled beat-to-beat signal extraction and fCTI measurement.
  • Achieved a 63% success rate for fCTI measurement.