Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Electrocardiogram01:29

Electrocardiogram

6.8K
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...
6.8K
Electrocardiogram Fundamentals01:28

Electrocardiogram Fundamentals

1.6K
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...
1.6K
ECG Interpretation of Rhythms01:24

ECG Interpretation of Rhythms

15.3K
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....
15.3K
Correlation between ECG and Cardiac Cycle01:25

Correlation between ECG and Cardiac Cycle

13.3K
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...
13.3K
Instrumentation Amplifier01:25

Instrumentation Amplifier

1.1K
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...
1.1K
Electrophysiology of Normal Cardiac Rhythm01:19

Electrophysiology of Normal Cardiac Rhythm

9.9K
The normal cardiac rhythm is a synchronized electrical activity that facilitates the regular and coordinated contraction of the heart muscle. This process is essential for efficient blood circulation throughout the body. The fundamental elements involved in establishing and maintaining this rhythm include the unique electrical properties of cardiac muscle cells, the sinoatrial (SA) node's pacemaker function, the specialized conducting system, and the ionic mechanisms underlying each phase...
9.9K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Quantifying Epidemiological Risk Transitions of COVID-19 in the Brazilian State of Ceará (2020-2023): A Generalized Linear Modeling Approach.

Epidemiologia (Basel, Switzerland)·2026
Same author

From Toxin to Therapy: Biomedical Applications of Bee Venom in Cancer, Diabetes, and Neurodegenerative Disorders.

International journal of molecular sciences·2026
Same author

Does creatine affect lipid profile? a systematic review and meta-analysis of randomized placebo-controlled trials.

Frontiers in nutrition·2026
Same author

Correction: Impact of creatine supplementation on inflammation: evidence from a systematic review and meta-analysis of randomized double-blind placebo trials.

Frontiers in immunology·2026
Same author

Reply - Letter to the editor.

Clinical nutrition ESPEN·2026
Same author

A child with a large ostium secundum atrial septal defect, pulmonary hypertension, and the characteristic Crochetage electro-vectorcardiographic pattern.

Journal of electrocardiology·2026
Same journal

Critical Appraisal of Self-Supervised Contrastive Pretraining for Extreme Few-Shot ECG Classification.

Annals of noninvasive electrocardiology : the official journal of the International Society for Holter and Noninvasive Electrocardiology, Inc·2026
Same journal

An Unusual Etiology of Bayés' Syndrome: Fabry Disease.

Annals of noninvasive electrocardiology : the official journal of the International Society for Holter and Noninvasive Electrocardiology, Inc·2026
Same journal

Interpreting ECG-Based Risk Stratification in Women With INOCA: Methodological Considerations From the WISE Cohort.

Annals of noninvasive electrocardiology : the official journal of the International Society for Holter and Noninvasive Electrocardiology, Inc·2026
Same journal

Electrocardiographic Repolarization Changes Following Orchiectomy: Insights Into QT Interval Prolongation and Clinical Implications.

Annals of noninvasive electrocardiology : the official journal of the International Society for Holter and Noninvasive Electrocardiology, Inc·2026
Same journal

Critique on Integrated Heart Sound-Electrocardiogram Synchronization System for Early Detecting Left Ventricular Systolic Dysfunction in Pediatric Populations.

Annals of noninvasive electrocardiology : the official journal of the International Society for Holter and Noninvasive Electrocardiology, Inc·2026
Same journal

Beyond Training Stability: The Need for Clinical Generalizability and Explainability in Self-Supervised ECG Models.

Annals of noninvasive electrocardiology : the official journal of the International Society for Holter and Noninvasive Electrocardiology, Inc·2026
See all related articles

Related Experiment Video

Updated: Feb 22, 2026

Real-Time Cardiac Mapping with a Noninvasive Imageless Electrocardiographic Imaging System
10:17

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

Published on: April 11, 2025

2.0K

Main artifacts in electrocardiography.

Andrés Ricardo Pérez-Riera1, Raimundo Barbosa-Barros2, Rodrigo Daminello-Raimundo1

  • 1Design of Studies and Scientific Writing Laboratory at the ABC School of Medicine, Santo André, São Paulo, Brazil.

Annals of Noninvasive Electrocardiology : the Official Journal of the International Society for Holter and Noninvasive Electrocardiology, Inc
|September 24, 2017
PubMed
Summary
This summary is machine-generated.

Electrocardiographic artifacts are ECG alterations unrelated to heart activity. Motion artifacts, caused by shaking, can distort ECGs, mimicking arrhythmias and complicating diagnosis.

Keywords:
artifactselectrode misplacementincorrect electrode interchangetremor artifacts

More Related Videos

Microelectrode Array Recording of Sinoatrial Node Firing Rate to Identify Intrinsic Cardiac Pacemaking Defects in Mice
09:20

Microelectrode Array Recording of Sinoatrial Node Firing Rate to Identify Intrinsic Cardiac Pacemaking Defects in Mice

Published on: July 5, 2021

3.6K
High-Throughput Analysis of Optical Mapping Data Using ElectroMap
07:36

High-Throughput Analysis of Optical Mapping Data Using ElectroMap

Published on: June 4, 2019

10.1K

Related Experiment Videos

Last Updated: Feb 22, 2026

Real-Time Cardiac Mapping with a Noninvasive Imageless Electrocardiographic Imaging System
10:17

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

Published on: April 11, 2025

2.0K
Microelectrode Array Recording of Sinoatrial Node Firing Rate to Identify Intrinsic Cardiac Pacemaking Defects in Mice
09:20

Microelectrode Array Recording of Sinoatrial Node Firing Rate to Identify Intrinsic Cardiac Pacemaking Defects in Mice

Published on: July 5, 2021

3.6K
High-Throughput Analysis of Optical Mapping Data Using ElectroMap
07:36

High-Throughput Analysis of Optical Mapping Data Using ElectroMap

Published on: June 4, 2019

10.1K

Area of Science:

  • Cardiology
  • Biomedical Engineering
  • Clinical Electrophysiology

Background:

  • Electrocardiographic (ECG) artifacts are alterations not originating from cardiac electrical activity.
  • These artifacts can distort key ECG components like the baseline and waves, potentially leading to misinterpretation.
  • Motion artifacts, a common type, arise from rhythmic body movements or tremors.

Purpose of the Study:

  • To define and categorize electrocardiographic artifacts, with a focus on motion artifacts.
  • To elucidate the diverse causes and clinical implications of motion artifacts in ECG readings.
  • To highlight how these artifacts can mimic or obscure true cardiac arrhythmias.

Main Methods:

  • Review of existing literature and clinical definitions of electrocardiographic artifacts.
  • Categorization of motion artifact causes, including physiological, pathological, and external factors.
  • Analysis of the impact of motion artifacts on ECG waveform interpretation.

Main Results:

  • Motion artifacts are characterized by rhythmic shaking, leading to distorted ECG signals.
  • Identified causes include tremors (Parkinson's, essential, intention), anxiety, hyperthyroidism, and certain medications.
  • Shivering, hypothermia, fever, and patient limb movements during ECG acquisition are also significant contributors.
  • Artifacts can mimic arrhythmias like premature contractions or interfere with the accurate assessment of supraventricular and ventricular arrhythmias.

Conclusions:

  • Electrocardiographic artifacts, particularly motion artifacts, represent a significant challenge in accurate ECG interpretation.
  • Understanding the varied etiologies of motion artifacts is crucial for distinguishing them from genuine cardiac events.
  • Effective identification and management of these artifacts are essential for reliable cardiac diagnostics.