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
Exercise Stress Test01:26

Exercise Stress Test

1.5K
Introduction
Exercise stress testing, commonly known as a treadmill test, is a noninvasive procedure used to evaluate cardiovascular function and diagnose heart conditions.
Definition
An exercise stress test measures the heart's response to exertion using a treadmill or stationary bicycle. Chest electrodes record the heart's electrical activity through an ECG, and blood pressure is monitored regularly.
Purposes
1.5K
ECG Interpretation of Rhythms01:24

ECG Interpretation of Rhythms

15.1K
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....
15.1K
ECG Interpretation of Arrhythmias II: Atrial, Junctional and Ventricular Arrhythmias01:25

ECG Interpretation of Arrhythmias II: Atrial, Junctional and Ventricular Arrhythmias

643
Arrhythmia is a condition characterized by an irregular heart rhythm, with ECG changes that differ based on its origin and nature. The types of arrhythmias discussed below include atrial, junctional, and ventricular arrhythmias.Atrial ArrhythmiasPremature Atrial Complexes (PACs): PACs are early atrial beats caused by stress, caffeine, alcohol, electrolyte imbalances, hypoxia, hyperthyroidism, or certain medications (e.g., bronchodilators and decongestants). The ECG shows early P waves with an...
643
Disturbances in Heart Rhythm01:29

Disturbances in Heart Rhythm

3.2K
Arrhythmia or dysrhythmia refers to an abnormal heart rhythm caused by a defect in the heart's conduction system. It can cause the heart to beat irregularly, too quickly, or too slowly, leading to symptoms like chest pain, shortness of breath, and fainting. Factors such as stress, caffeine, alcohol, nicotine, cocaine, certain drugs, congenital defects, diseases, and electrolyte abnormalities can trigger arrhythmias.
Arrhythmias are categorized by their speed, rhythm, and origin. A slow heart...
3.2K

You might also read

Related Articles

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

Sort by
Same author

Smartwatch-Based Heart Rate Detection in Atrial, Ventricular and Pulseless Arrhythmias.

Heart, lung & circulation·2026
Same author

NLRP3 inflammasome: A key player in cardiac fibroblast to myofibroblast transition.

Pathology, research and practice·2026
Same author

Right Atrial Myxoma With Dual Coronary Artery Feeding: A Vascular Surprise.

JACC. Case reports·2026
Same author

Ellis-van Creveld Syndrome: Common Atrium with Post-axial Polydactyly.

QJM : monthly journal of the Association of Physicians·2026
Same author

Anticoagulation discontinuation after atrial fibrillation ablation: A systematic review and meta-analysis of randomized and observational evidence.

Indian pacing and electrophysiology journal·2026
Same author

When the left ventricle dances: ballerina foot appearance in hypertrophic cardiomyopathy.

The Journal of invasive cardiology·2026

Related Experiment Video

Updated: Feb 20, 2026

Tilt Testing with Combined Lower Body Negative Pressure: a "Gold Standard" for Measuring Orthostatic Tolerance
14:09

Tilt Testing with Combined Lower Body Negative Pressure: a "Gold Standard" for Measuring Orthostatic Tolerance

Published on: March 21, 2013

22.0K

Tilted ECG - An unusual tilt test response.

Anunay Gupta1, Neeraj Parakh1, Rajnish Juneja1

  • 1Department of Cardiology, All India Institute of Medical Sciences, New Delhi, India.

Indian Pacing and Electrophysiology Journal
|October 27, 2017
PubMed
Summary

Head up tilt testing can cause presyncope. In a pediatric case, ST elevation during testing was caused by ECG filter issues, not a cardiac event, emphasizing filter importance.

Area of Science:

  • Cardiology
  • Pediatric Cardiology
  • Diagnostic Tools

Background:

  • Head up tilt testing (HUTT) is a standard diagnostic method for evaluating syncope of unknown origin.
  • Syncope, or fainting, can have various underlying causes requiring accurate diagnosis.
  • Electrocardiographic (ECG) monitoring is crucial during HUTT to detect cardiac abnormalities.

Purpose of the Study:

  • To report a unique case of presyncope during HUTT in a pediatric patient.
  • To investigate the cause of ST segment elevation observed during HUTT.
  • To underscore the significance of proper ECG filter settings in diagnostic testing.

Main Methods:

  • A 12-year-old male underwent provocative head up tilt testing.
  • Continuous ECG monitoring was performed during the tilt test.

More Related Videos

A Research Method For Detecting Transient Myocardial Ischemia In Patients With Suspected Acute Coronary Syndrome Using Continuous ST-segment Analysis
18:11

A Research Method For Detecting Transient Myocardial Ischemia In Patients With Suspected Acute Coronary Syndrome Using Continuous ST-segment Analysis

Published on: December 28, 2012

24.8K
Patient Directed Recording of a Bipolar Three-Lead Electrocardiogram using a Smartwatch with ECG Function
05:03

Patient Directed Recording of a Bipolar Three-Lead Electrocardiogram using a Smartwatch with ECG Function

Published on: December 11, 2019

9.1K

Related Experiment Videos

Last Updated: Feb 20, 2026

Tilt Testing with Combined Lower Body Negative Pressure: a "Gold Standard" for Measuring Orthostatic Tolerance
14:09

Tilt Testing with Combined Lower Body Negative Pressure: a "Gold Standard" for Measuring Orthostatic Tolerance

Published on: March 21, 2013

22.0K
A Research Method For Detecting Transient Myocardial Ischemia In Patients With Suspected Acute Coronary Syndrome Using Continuous ST-segment Analysis
18:11

A Research Method For Detecting Transient Myocardial Ischemia In Patients With Suspected Acute Coronary Syndrome Using Continuous ST-segment Analysis

Published on: December 28, 2012

24.8K
Patient Directed Recording of a Bipolar Three-Lead Electrocardiogram using a Smartwatch with ECG Function
05:03

Patient Directed Recording of a Bipolar Three-Lead Electrocardiogram using a Smartwatch with ECG Function

Published on: December 11, 2019

9.1K
  • Repeat tilt testing with Holter monitoring was conducted for further evaluation.
  • Analysis of ECG data, focusing on filter application, was performed.

    • Main Results:

    • The patient experienced presyncope during the initial head up tilt test.
    • Transient ST segment elevation was noted on the cardiac monitor during presyncope.
    • Subsequent testing revealed a left bundle branch block escape rhythm.
    • The ST segment elevation was attributed to improper filter application on a single-lead ECG monitor.

    Conclusions:

    • ST segment elevation during HUTT in this case was an artifact, not indicative of acute myocardial injury.
    • Correct application of filters in ECG monitoring is critical for accurate interpretation of results.
    • This case highlights potential pitfalls in HUTT and the importance of technical considerations in diagnostic ECG.