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

ECG Interpretation of Rhythms01:24

ECG Interpretation of Rhythms

17.4K
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....
17.4K
Electrocardiogram01:29

Electrocardiogram

7.4K
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...
7.4K
Electrocardiogram Fundamentals01:28

Electrocardiogram Fundamentals

1.8K
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...
1.8K
Correlation between ECG and Cardiac Cycle01:25

Correlation between ECG and Cardiac Cycle

14.3K
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...
14.3K
Interval Level of Measurement00:55

Interval Level of Measurement

19.9K
For effective statistical analysis, data are classified into four levels of measurement—nominal, ordinal, interval, and ratio.
Data measured using the interval scale are similar to ordinal level data because they have a definite arrangement. However, in the interval level of measurement, the differences between data values are meaningful even though the data does not have a starting point.
Temperature is measured using the interval scale. It is measurable data, and the difference between...
19.9K
Dysrhythmias IV: Characteristics of Bradyarrhythmias01:18

Dysrhythmias IV: Characteristics of Bradyarrhythmias

763
Bradyarrhythmias are cardiac rhythm disorders characterized by a slower-than-normal heart rate, typically defined as fewer than 60 beats per minute. Some of which are discussed here:Sinus BradycardiaSinus bradycardia presents a heart rate lower than 60 beats per minute, with a regular rhythm originating from the SA node. The ECG typically shows normal P waves preceding each QRS complex, a normal PR interval (0.12 to 0.20 seconds), and a normal QRS duration (0.06 to 0.10 seconds).First-Degree AV...
763

You might also read

Related Articles

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

Sort by
Same author

Development and Validation of a Novel, Disease-Specific, Caregiver-Reported Outcome Measure: The Duchenne Muscular Dystrophy Caregiver Reported-Health Index (DMDCR-HI).

Muscle & nerve·2026
Same author

Development and Validation of the Inclusion Body Myositis-Health Index: A Disease-Specific Patient-Reported Outcome Measure for Use in Clinical Trials and Drug-Labeling Claims.

Journal of clinical neuromuscular disease·2026
Same author

The Parkinson's Disease-Health Index: A novel, disease-specific patient-reported outcome measure.

Journal of Parkinson's disease·2026
Same author

A Method for Heartbeat Extraction Using Combined BCG and IPG Signals from a Smart Shoe Insole.

Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference·2025
Same author

Development and Validation of a Disease-Specific, Patient-Reported Outcome Measure: The Myotonic Dystrophy Type 2 Health Index.

Muscle & nerve·2025
Same author

A comparative study on the effect of age on Neck Disability Index improvement at 24 months after surgical intervention for cervical spondylotic myelopathy: a Quality Outcomes Database study.

Journal of neurosurgery. Spine·2025

Related Experiment Video

Updated: Mar 17, 2026

Methods for ECG Evaluation of Indicators of Cardiac Risk, and Susceptibility to Aconitine-induced Arrhythmias in Rats Following Status Epilepticus
08:28

Methods for ECG Evaluation of Indicators of Cardiac Risk, and Susceptibility to Aconitine-induced Arrhythmias in Rats Following Status Epilepticus

Published on: April 5, 2011

18.3K

The QT Scale: A Weight Scale Measuring the QTc Interval.

Jean-Philippe Couderc1, Connor Beshaw1, Xiaodan Niu1

  • 1Heart Research Follow-Up Program, Cardiology Department, University of Rochester Medical Center, Rochester, NY, USA.

Annals of Noninvasive Electrocardiology : the Official Journal of the International Society for Holter and Noninvasive Electrocardiology, Inc
|July 17, 2016
PubMed
Summary
This summary is machine-generated.

A novel QT scale device accurately measures heart rate (HR) and QTc interval, crucial for assessing cardiac risk. This innovation could integrate vital cardiac monitoring into routine clinical practice.

Keywords:
clinicalelectrocardiographyelectrophysiologylong QT syndromenoninvasive techniques

More Related Videos

Electrophysiological Analysis of human Pluripotent Stem Cell-derived Cardiomyocytes hPSC-CMs Using Multi-electrode Arrays MEAs
11:13

Electrophysiological Analysis of human Pluripotent Stem Cell-derived Cardiomyocytes hPSC-CMs Using Multi-electrode Arrays MEAs

Published on: May 12, 2017

21.0K
Analyzing Long-Term Electrocardiography Recordings to Detect Arrhythmias in Mice
06:07

Analyzing Long-Term Electrocardiography Recordings to Detect Arrhythmias in Mice

Published on: May 23, 2021

4.5K

Related Experiment Videos

Last Updated: Mar 17, 2026

Methods for ECG Evaluation of Indicators of Cardiac Risk, and Susceptibility to Aconitine-induced Arrhythmias in Rats Following Status Epilepticus
08:28

Methods for ECG Evaluation of Indicators of Cardiac Risk, and Susceptibility to Aconitine-induced Arrhythmias in Rats Following Status Epilepticus

Published on: April 5, 2011

18.3K
Electrophysiological Analysis of human Pluripotent Stem Cell-derived Cardiomyocytes hPSC-CMs Using Multi-electrode Arrays MEAs
11:13

Electrophysiological Analysis of human Pluripotent Stem Cell-derived Cardiomyocytes hPSC-CMs Using Multi-electrode Arrays MEAs

Published on: May 12, 2017

21.0K
Analyzing Long-Term Electrocardiography Recordings to Detect Arrhythmias in Mice
06:07

Analyzing Long-Term Electrocardiography Recordings to Detect Arrhythmias in Mice

Published on: May 23, 2021

4.5K

Area of Science:

  • Cardiology
  • Biomedical Engineering
  • Medical Devices

Background:

  • QTc prolongation is a key indicator of cardiac risk but is not routinely measured.
  • Current clinical practice lacks accessible tools for consistent QTc interval assessment.

Purpose of the Study:

  • To evaluate the reliability and validity of a novel "QT scale" device for measuring heart rate (HR) and QTc interval.
  • To assess the potential of the QT scale for routine clinical use in cardiac risk assessment.

Main Methods:

  • The QT scale, a weight scale with integrated ECG sensors, was tested on healthy subjects and cardiac patients.
  • Comparisons were made against standard 12-lead ECG recordings using intraclass correlation coefficient (ICC) and paired difference analysis.

Main Results:

  • The QT scale demonstrated similar automatic heart rate and QTc measurements compared to clinical devices in healthy subjects.
  • Measurement stability was comparable, with ICC values of 91% for the QT scale versus 80% for the clinical device in validation cohorts.

Conclusions:

  • The "QT scale device" provides valid measurements of heart rate and QTc interval.
  • This device shows promise for integrating QTc monitoring into standard clinical workflows.