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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...

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...

Cardiac Catheterization II: Right Heart Catheterization

Cardiac Catheterization II: Right Heart Catheterization

Right Heart Catheterization: An OverviewRight heart catheterization is an invasive diagnostic procedure that measures right-sided cardiac and pulmonary artery pressures, calculates cardiac output, and identifies intracardiac shunts. It provides detailed hemodynamic data essential for diagnosing and managing various cardiovascular conditions, such as pulmonary hypertension.Access SitesCommon access sites for right heart catheterization include the internal jugular vein in the neck region, the...

Imaging Studies for Cardiovascular System I:Echocardiography

Imaging Studies for Cardiovascular System I:Echocardiography

Cardiac imaging studies encompass a wide range of noninvasive and minimally invasive techniques designed to visualize the heart's structure and function in detail. One such technique is echocardiography, which uses high-frequency ultrasound waves to produce detailed images of the heart, known as echocardiograms.
Indications: Echocardiography is utilized to diagnose heart failure, valve disorders, and myocardial infarction. It also assesses cardiac structures' size, shape, and motion,...

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...

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Related Experiment Video

Updated: Apr 2, 2026

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

Real-time vectorcardiography simulator system.

William R Rodriguez¹, Hernan A Bernal², Diana Patricia Amador-Munoz³

¹Department of Electronic Engineering, Faculty of Engineering, Pontificia Universidad Javeriana, Bogota, Colombia.

|March 31, 2026

Summary

This summary is machine-generated.

This study introduces a low-cost, real-time vectorcardiography (VCG) simulator with a physical interface to enhance medical education. The interactive VCG simulator aids in understanding complex cardiac electrophysiology through hands-on learning.

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Last Updated: Apr 2, 2026

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In Silico Clinical Trials for Cardiovascular Disease

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Published on: May 27, 2022

Area of Science:

Biomedical Engineering
Medical Education
Cardiovascular Physiology

Background:

Vectorcardiography (VCG) offers spatial insights into cardiac electrical activity but faces educational limitations due to complexity.
Lack of interactive tools hinders VCG application in medical and bioengineering curricula.

Purpose of the Study:

To develop a low-cost, real-time VCG simulator with a physical interface to improve electrophysiology education.
To bridge the pedagogical gap in understanding cardiac electrical activity using VCG.

Main Methods:

Developed a simulator integrating a physical wet-lab interface (conductive medium, electrodes) and digital signal processing.
Users manually simulate cardiac vectors to observe real-time electrophysiological signal consequences.
Validated the system via theoretical analysis, ECG data emulation, and user-driven tests.

Main Results:

The simulator demonstrated educational value in a pilot study with medical students and instructors.
Hands-on interaction fostered deeper cognitive engagement and integration of complex concepts.
System validation confirmed theoretical conformity, ECG data emulation, and user-driven waveform generation.

Conclusions:

The cost-effective, open-source VCG simulator enhances cardiac electrophysiology education.
The interactive VCG simulator promotes deeper learning and potential broader clinical adoption.
This tool offers a scalable solution for improving VCG understanding in academic and clinical settings.