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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...

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 muscle...

Correlation between ECG and Cardiac Cycle

Correlation between ECG and Cardiac Cycle

The electrical signals recorded on an electrocardiogram (ECG) occur before the mechanical processes of contraction and relaxation during the cardiac cycle.
A cardiac action potential originates in the SA node and spreads throughout the atria and the AV node in approximately 0.03 seconds. This results in the P wave in an ECG and triggers atrial contraction. The action potential is then briefly slowed at the AV node, allowing the atria to contract and fill the ventricles with blood before...

Holter Monitor: 24-Hour Monitoring

Holter Monitor: 24-Hour Monitoring

Holter monitoring is a continuous electrocardiography (ECG) recording that tracks the heart's electrical activity over an extended period, generally 24 to 48 hours. This noninvasive diagnostic tool detects irregular heart rhythms that may not be captured during a standard ECG performed in a clinical setting.DeviceThe Holter monitor is a portable, small device connected to several electrodes on the patient's chest. These electrodes detect the heart's electrical signals and transmit them to the...

Dysrhythmias V: Evaluating Dysrhythmias

Dysrhythmias V: Evaluating Dysrhythmias

Dysrhythmias, also known as arrhythmias, are disturbances in the heart's rhythm that range from benign to life-threatening. A thorough evaluation is crucial for appropriate management and involves a comprehensive medical history, physical examination, and various diagnostic tests.Medical HistorySymptoms: Collect detailed information on palpitations, dizziness, syncope, chest pain, and fatigue. Note their onset, frequency, and triggers.Previous Cardiac Issues: Document any history of heart...

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Updated: Jun 18, 2026

A Novel Digital Platform for a Monitored Home-based Cardiac Rehabilitation Program

A Novel Digital Platform for a Monitored Home-based Cardiac Rehabilitation Program

Published on: April 19, 2019

Web-based sharing of electrocardiogram: a framework for information publishing.

Shizhong Yuan¹, Daming Wei, Weimin Xu

¹Biomedical Information Technology Laboratory, University of Aizu, Aizu-Wakamatsu, Fukushima 965-8580, Japan.

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

|December 8, 2009

Summary

This summary is machine-generated.

This study presents a framework for publishing electrocardiogram (ECG) data, enabling effective sharing and retrieval of ECGs across healthcare networks. The developed prototype successfully published and allowed discovery of ECGs conforming to the MFER standard.

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Real-Time Cardiac Mapping with a Noninvasive Imageless Electrocardiographic Imaging System

Real-Time Cardiac Mapping with a Noninvasive Imageless Electrocardiographic Imaging System

Published on: April 11, 2025

Area of Science:

Medical Informatics
Health Information Systems
Biomedical Engineering

Background:

Network-based data sharing is increasingly vital in medicine and healthcare.
Previous work introduced a Search and Retrieval Architecture (SRA) for web-based electrocardiogram (ECG) sharing.
The SRA architecture involves an ECG metadata registry, provider, and querist.

Purpose of the Study:

To present a framework for ECG information publishing by an ECG provider.
To introduce a prototype of this framework for experimental assessment.
To evaluate the framework's effectiveness in publishing and enabling retrieval of ECG data.

Main Methods:

Development of a framework for ECG information publishing.
Implementation of a prototype for an experimental assessment scenario.
Testing based on MFER (IEEE standard from Japan) for emulated electrocardiographs.

Main Results:

The prototype effectively published ECGs from emulated MFER-conformant electrocardiographs.
Published ECGs were successfully discovered and retrieved via the Internet.
The framework demonstrated practical application in a controlled assessment.

Conclusions:

The developed framework facilitates efficient ECG information publishing.
The system enables seamless discovery and retrieval of ECG data over networks.
This contributes to improved ECG data sharing in healthcare settings.