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Electrocardiogram

Electrocardiogram

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...

Pulse rhythm

Pulse rhythm

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...

Instrumentation Amplifier

Instrumentation Amplifier

An electrocardiography (ECG) machine is an essential piece of medical equipment used to monitor the electrical activity of the heart. It operates by detecting small electrical changes on the skin that result from the depolarization of the heart muscle during each heartbeat. However, these signals are in the microvolt range and can be easily overwhelmed by noise or interference.
To overcome this challenge, an ECG machine utilizes an instrumentation amplifier. This specialized amplifier is...

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Related Experiment Video

Updated: May 17, 2025

A Real-Time Wearable Electromyography Measurement System for Small Animals

A Real-Time Wearable Electromyography Measurement System for Small Animals

Published on: November 15, 2024

Motion-unrestricted dynamic electrocardiogram system utilizing imperceptible electronics.

Ding Li¹, Tian-Rui Cui¹, Jia-Hao Liu²

¹School of Integrated Circuit, Tsinghua University, Beijing, China.

Nature Communications

|April 5, 2025

Summary

This summary is machine-generated.

A new motion-unrestricted dynamic electrocardiogram (MU-DCG) system uses skin-conformal electronics for comfortable, accurate 12-lead monitoring during movement. This innovation minimizes motion artifacts, improving cardiovascular disease assessment.

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Conformable Wearable Electrodes: From Fabrication to Electrophysiological Assessment

Conformable Wearable Electrodes: From Fabrication to Electrophysiological Assessment

Published on: July 22, 2022

Area of Science:

Biomedical Engineering
Cardiology
Wearable Technology

Background:

Electrocardiogram (ECG) is crucial for cardiovascular disease (CVD) management.
Current dynamic electrocardiogram (DCG) devices struggle with accuracy and comfort during patient motion.
This limitation hinders daily cardiovascular risk screening and increases healthcare costs.

Purpose of the Study:

To develop a motion-unrestricted dynamic electrocardiogram (MU-DCG) system for accurate, long-term cardiac monitoring.
To enable comfortable and imperceptible wear during daily activities and dynamic movements.
To reduce motion artifacts in ECG signals for improved CVD assessment.

Main Methods:

Developed a MU-DCG system with skin-conformal, imperceptible electronics.
Utilized a pressure-activated flexible skin socket for connecting on-skin and off-skin modules.
Incorporated large-area, ultra-thin on-skin electrodes/leads and an off-skin analysis module.
Conducted blinded cardiologist evaluations to assess signal quality and motion artifacts.

Main Results:

The MU-DCG system provides long-term, comfortable, and accurate 12-lead DCG monitoring.
The flexible skin socket ensures stable connection during dynamic movements.
Blinded cardiologist reviews confirmed minimal motion artifacts in MU-DCG acquired signals.
The system demonstrated anti-motion interference acquisition and in-situ analysis with wearing imperceptibility.

Conclusions:

The MU-DCG system overcomes limitations of current DCG devices, offering superior performance during motion.
This technology facilitates unobtrusive, high-fidelity cardiac monitoring for improved CVD prevention and diagnosis.
The MU-DCG system represents a significant advancement in wearable cardiovascular monitoring technology.