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Related Concept Videos

Electrocardiogram Fundamentals01:28

Electrocardiogram Fundamentals

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Introduction
An electrocardiogram (ECG) is a diagnostic tool for identifying cardiac conditions such as arrhythmias, conduction abnormalities, and myocardial ischemia.
Definition
An electrocardiogram (ECG) visualizes the heart's electrical activity by tracing the electrical movement associated with each heartbeat on a graph or monitor. As the heart beats, an electrical wave passes through it, correlating with the cardiac cycle events.
Parts of an ECG
An ECG utilizes electrodes on the skin...
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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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Related Experiment Video

Updated: Apr 26, 2026

Real-Time Cardiac Mapping with a Noninvasive Imageless Electrocardiographic Imaging System
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Contactless 12-lead electrocardiogram via deep computational radar.

Zhi Lu1, Jinbo Chen1, Dongheng Zhang1

  • 1School of Cyber Science and Technology, University of Science and Technology of China, Hefei, Anhui, China.

Npj Biomedical Innovations
|April 24, 2026
PubMed
Summary
This summary is machine-generated.

CardioRadar uses radar to create contactless electrocardiograms (ECG) from chest movements, offering a scalable solution for continuous cardiovascular disease monitoring. This innovation promises accessible, long-term heart health diagnostics.

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Area of Science:

  • Biomedical Engineering
  • Cardiology
  • Medical Devices

Background:

  • Cardiovascular disease (CVD) is a leading global cause of death.
  • Current electrocardiogram (ECG) methods require physical contact and are intermittent.
  • There is a need for continuous, contactless cardiovascular diagnostics.

Purpose of the Study:

  • To introduce and validate CardioRadar, a novel radar-based system for contactless 12-lead ECG monitoring.
  • To assess the accuracy and reliability of CardioRadar compared to traditional ECG.
  • To explore the potential of CardioRadar for continuous, long-term cardiovascular care.

Main Methods:

  • Developed custom radar hardware to capture cardiac-induced chest micro-motions.
  • Employed data-driven inverse modeling to reconstruct electrical signals from mechanical motion.
  • Clinically validated the system in 6974 individuals across various settings, comparing results to ground-truth ECG.

Main Results:

  • CardioRadar achieved a mean correlation of 0.75 and median RMSE of 0.07 mV against gold-standard ECG.
  • Demonstrated low inter-beat interval error (median: 5.60 ms).
  • Successfully detected arrhythmias and supported continuous overnight monitoring.

Conclusions:

  • CardioRadar offers a clinically validated, contactless method for 12-lead ECG monitoring.
  • The system shows potential as a transformative, low-cost solution for widespread cardiovascular care.
  • Enables equitable, continuous, and scalable long-term monitoring of heart health.