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

6.3K
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...
6.3K
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
Quality Control01:05

Quality Control

2.6K
Quality control is one of the three cyclical quality assurance activities that help keep a system under statistical control. Typical quality control activities include creating quality control charts, conducting proficiency testing, and documenting and archiving results.
Quality control helps track data, visualize trends, and identify variations, making it easier to detect deviations that may affect the accuracy of an analysis. One way to do this is by generating a quality control chart, which...
2.6K
Quality Assurance01:19

Quality Assurance

2.3K
Quality assurance is the overarching term used to describe the activities employed to ensure the proper performance of a system. These activities can be classified into three categories: quality control, quality assessment, and internal corrective measures. Typically, these activities work cyclically: quality control is performed before and during the analysis, while quality assessment occurs during and after the investigation. Internal corrective measures are implemented based on the findings...
2.3K
Quality of Water01:19

Quality of Water

570
In concrete preparation, the quality of water is paramount as it affects the strength and durability of the concrete. Potable water is usually preferred; however, it must not have excessive sodium or potassium to prevent compromising the concrete's integrity. Water quality is typically evaluated based on impurities such as dissolved solids, chlorides, and sulfates, and its pH value is ideally between 6 and 8. Even slightly acidic natural water may be acceptable unless it contains harmful...
570
Contact-dependent Signaling01:19

Contact-dependent Signaling

47.5K
Contact-dependent signaling, as the name suggests, requires that communicating cells be in direct contact with each other. This is achieved either through receptor-ligand interactions or by specialized cytoplasmic channels that allow the flow of small molecules between cells. In animal cells, channels called gap junctions facilitate contact-dependent signaling in certain tissues, whereas, plasmodesmata perform a similar function in plants.
Gap Junctions
In animal cells, gap junctions are formed...
47.5K

You might also read

Related Articles

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

Sort by
Same author

Inter-Avalanche Intervals and a Temporal-Scaling Signature in EEG Criticality.

IEEE transactions on bio-medical engineering·2026
Same author

Continuous bidirectional coupling of heart rate variability and emotions in dyad speaker-listener dynamics reveals unique interpersonal synchronization.

Frontiers in systems neuroscience·2026
Same author

In-ear EEG wearables for brain activity assessment and cognitive rehabilitation: the emerging role of multimodal embedded intelligence.

Frontiers in human neuroscience·2026
Same author

Quantifying emotion-dependent brain-eye interactions during audiovisual emotional stimulation.

Frontiers in systems neuroscience·2026
Same author

Wearable ECG and PPG for anxiety detection: a translational digital medicine perspective.

NPJ digital medicine·2026
Same author

Bidirectional coupling of physiology and emotions reveals unique speaker-listener dynamics.

Social cognitive and affective neuroscience·2026

Related Experiment Video

Updated: Feb 5, 2026

Real-Time Electrocardiogram Monitoring During Treadmill Training in Mice
04:45

Real-Time Electrocardiogram Monitoring During Treadmill Training in Mice

Published on: May 5, 2022

3.0K

Dynamic signal quality index for electrocardiograms.

Negin Yaghmaie1,2, Mohammad Ali Maddah-Ali2, Herbert F Jelinek3,4

  • 1Department of Electrical and Computer Systems Engineering, Monash University, Clayton VIC 3800, Australia.

Physiological Measurement
|September 6, 2018
PubMed
Summary

A new dynamic signal quality index (dSQI) enhances electrocardiogram (ECG) diagnostic accuracy by providing continuous, beat-by-beat signal quality assessment. This method effectively identifies noisy recordings, even in patients with arrhythmias.

More Related Videos

Electrocardiogram Recordings in Anesthetized Mice using Lead II
04:16

Electrocardiogram Recordings in Anesthetized Mice using Lead II

Published on: June 20, 2020

14.3K
Implantation of Electroencephalogram and Electrocardiogram Telemetry Devices in Neonatal Rabbit Kits
06:46

Implantation of Electroencephalogram and Electrocardiogram Telemetry Devices in Neonatal Rabbit Kits

Published on: February 28, 2025

819

Related Experiment Videos

Last Updated: Feb 5, 2026

Real-Time Electrocardiogram Monitoring During Treadmill Training in Mice
04:45

Real-Time Electrocardiogram Monitoring During Treadmill Training in Mice

Published on: May 5, 2022

3.0K
Electrocardiogram Recordings in Anesthetized Mice using Lead II
04:16

Electrocardiogram Recordings in Anesthetized Mice using Lead II

Published on: June 20, 2020

14.3K
Implantation of Electroencephalogram and Electrocardiogram Telemetry Devices in Neonatal Rabbit Kits
06:46

Implantation of Electroencephalogram and Electrocardiogram Telemetry Devices in Neonatal Rabbit Kits

Published on: February 28, 2025

819

Area of Science:

  • Biomedical Engineering
  • Signal Processing
  • Cardiology

Background:

  • Telehealth and remote monitoring necessitate reliable electrocardiogram (ECG) signal quality for accurate diagnosis.
  • Noise and artifacts are common in ECG recordings, compromising clinical interpretation.
  • Continuous signal quality monitoring is crucial for high diagnostic accuracy in cardiovascular applications.

Purpose of the Study:

  • Introduce a dynamic signal quality index (dSQI) for continuous ECG signal quality assessment.
  • Develop a time-frequency template-based approach for robust artifact detection.
  • Evaluate the performance of dSQI against existing metrics for improved diagnostic reliability.

Main Methods:

  • Applied smoothed pseudo Wigner-Ville transform to derive ECG time-frequency patterns.
  • Utilized a weighted cross-correlation function to score ECG beat quality (0-1).
  • Validated dSQI using PhysioNet databases, comparing against state-of-the-art indexes and classifying recordings.

Main Results:

  • dSQI outperformed individual metrics with AUCs of 93.18% (normal vs. noisy) and 93.69% (abnormal vs. noisy).
  • Combined dSQI with other indexes achieved high classification accuracy (up to 97.6% on training, 96.3% on test sets).
  • Demonstrated dSQI's effectiveness in the MIT-BIH Arrhythmia Database for common arrhythmia cases.

Conclusions:

  • dSQI offers a more accurate and continuous scalar metric for beat-by-beat ECG quality assessment.
  • The method proves effective even in the presence of arrhythmias.
  • dSQI is a valuable tool for ensuring diagnostic accuracy in telehealth and remote patient monitoring settings.