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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 the T...

Electrocardiogram Fundamentals

Electrocardiogram Fundamentals

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 to...

ECG Interpretation of Rhythms

ECG Interpretation of Rhythms

An electrocardiogram (ECG)graphically represents the heart's electrical activity on ECG paper or a monitor.
Components of the Electrocardiogram
The primary components of a normal ECG waveform in Normal sinus rhythm(NSR) include the P wave, PR interval, QRS complex, ST segment, T wave, and occasionally a U wave.
ECG waveforms are divided by vertical and horizontal lines at standard intervals.
The horizontal axis measures time and rate, and the vertical axis measures amplitude or voltage. When...

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Related Experiment Video

Updated: Jul 17, 2026

Electrocardiogram Recordings in Anesthetized Mice using Lead II

Electrocardiogram Recordings in Anesthetized Mice using Lead II

Published on: June 20, 2020

A new ECG obtained from MCG-recordings.

Shiqin Jiang¹, Jiong Yu, Bo Chen

¹Department of Information & Control Engineering, Tongji University, Shanghai, China.

Conference Proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual Conference

|February 3, 2007

Summary

Magneto-electrocardiography (magneto-ECG) offers a novel approach to analyzing cardiac electrical activity. This computational study shows magneto-ECG provides additional insights beyond standard ECG for early heart disease detection.

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Last Updated: Jul 17, 2026

Electrocardiogram Recordings in Anesthetized Mice using Lead II

Electrocardiogram Recordings in Anesthetized Mice using Lead II

Published on: June 20, 2020

Ambulatory ECG Recording in Mice

Ambulatory ECG Recording in Mice

Published on: May 27, 2010

Noninvasive Electrocardiography in the Perinatal Mouse

Noninvasive Electrocardiography in the Perinatal Mouse

Published on: June 12, 2020

Area of Science:

Biophysics
Computational Biology
Cardiology

Background:

The standard electrocardiogram (ECG) records electrical activity from the heart's surface.
The magneto-ECG addresses the inverse problem in electrocardiography, utilizing magnetic field signals.
Investigating the magneto-ECG provides a deeper understanding of cardiac electrophysiology.

Purpose of the Study:

To computationally study the magneto-electrocardiogram (magneto-ECG) and its correlative current dipole vector map.
To explore the diagnostic potential of magneto-ECG for cardiac diseases.
To compare magneto-ECG findings with conventional ECG waveforms.

Main Methods:

A computational approach was used to analyze magneto-ECG data.
Magnetic field signals were recorded at 36 locations on the human heart surface.
The study involved 6-lead magneto-ECG analysis, current dipole vector mapping, and current density distribution mapping.

Main Results:

Magneto-ECG and current dipole vector maps reveal P-wave, QRS-wave, and T-wave properties.
This method provides additional information on the heart's electrophysiological activity compared to standard ECG.
The study successfully mapped the correlative locus of the total current dipole vector during the cardiac cycle.

Conclusions:

Magneto-ECG and current dipole vector mapping offer valuable insights into cardiac electrical function.
These advanced techniques may aid in the early diagnosis of various cardiac diseases.
The findings suggest a promising future for magneto-ECG in clinical cardiology.