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

3.9K
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...
3.9K
Exercise Stress Test01:26

Exercise Stress Test

588
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
588
Holter Monitor: 24-Hour Monitoring01:23

Holter Monitor: 24-Hour Monitoring

495
Holter monitoring is a continuous electrocardiography (ECG) recording that tracks the heart's electrical activity over an extended period, generally 24 to 48 hours. This noninvasive diagnostic tool detects irregular heart rhythms that may not be captured during a standard ECG performed in a clinical setting.DeviceThe Holter monitor is a portable, small device connected to several electrodes on the patient's chest. These electrodes detect the heart's electrical signals and transmit them to the...
495
Electrocardiogram Fundamentals01:28

Electrocardiogram Fundamentals

975
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...
975
Dysrhythmias V: Evaluating Dysrhythmias01:30

Dysrhythmias V: Evaluating Dysrhythmias

150
Dysrhythmias, also known as arrhythmias, are disturbances in the heart's rhythm that range from benign to life-threatening. A thorough evaluation is crucial for appropriate management and involves a comprehensive medical history, physical examination, and various diagnostic tests.Medical HistorySymptoms: Collect detailed information on palpitations, dizziness, syncope, chest pain, and fatigue. Note their onset, frequency, and triggers.Previous Cardiac Issues: Document any history of heart...
150
Pulse rhythm01:30

Pulse rhythm

999
Pulse rhythm refers to the pattern of pulsations within specific intervals, offering valuable insights into the regularity or irregularity of the heart's beats as observed through the pattern of pulsation within specific intervals. A regular pulse exhibits a consistent heart rate with uniform waveforms and pulsation force, variations of which can be classified as normal, weak, or bounding.
Conversely, an irregular pulse pattern is termed dysrhythmia, stemming from disruptions in cardiac...
999

You might also read

Related Articles

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

Sort by
Same author

Pressure Measurements Obtained from Intraosseous Access: Potential Clinical Applications Explored Using a Porcine Model.

Journal of cardiovascular translational research·2026
Same author

Iatrogenic coronary artery dissections: direct visualization and mechanistic insights from the visible heart laboratories.

Hellenic journal of cardiology : HJC = Hellenike kardiologike epitheorese·2025
Same author

Multiphoton Microscopy to Visualize Live Renal Nerves in Reanimated Kidney Blocks.

Journal of imaging·2025
Same author

High-Resolution Iodine-Enhanced Micro-Computed Tomography of Intact Human Hearts for Detailed Coronary Microvasculature Analyses.

Journal of imaging·2024
Same author

Contemporary outcomes of chronic total occlusion percutaneous coronary intervention in Europe: the ERCTO registry.

EuroIntervention : journal of EuroPCR in collaboration with the Working Group on Interventional Cardiology of the European Society of Cardiology·2024
Same author

Feasibility of His bundle pacing facilitated by EASI derived 12‑lead ECG.

Journal of electrocardiology·2023

Related Experiment Video

Updated: Oct 18, 2025

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

8.8K

Smartphone-derived multichannel electrocardiogram for exercise stress testing.

Alexander Langanke1, Nicolaus Reifart2, Joerg Reifart3

  • 1Kliniken des Main Taunus Kreises, Medizinische Klinik 1, Kronberger Straße 36, 65812 Bad Soden, Germany.

Journal of Electrocardiology
|October 3, 2021
PubMed
Summary
This summary is machine-generated.

Mobile electrocardiogram (ECG) devices reliably interpret heart rhythms and conduction at rest and during exercise. While accurate for most findings, ST-deviation detection during exercise shows lower accuracy compared to standard 12-lead ECG.

Keywords:
ElectrocardiogramIschemiaSmartphoneVector-ECG

More Related Videos

A Novel Digital Platform for a Monitored Home-based Cardiac Rehabilitation Program
04:24

A Novel Digital Platform for a Monitored Home-based Cardiac Rehabilitation Program

Published on: April 19, 2019

12.0K
Evaluation of Hydration Status by Bioelectrical Impedance Vector Analysis in Patients with Ischemic Heart Disease Undergoing Exercise Stress Test
10:21

Evaluation of Hydration Status by Bioelectrical Impedance Vector Analysis in Patients with Ischemic Heart Disease Undergoing Exercise Stress Test

Published on: September 22, 2023

757

Related Experiment Videos

Last Updated: Oct 18, 2025

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

8.8K
A Novel Digital Platform for a Monitored Home-based Cardiac Rehabilitation Program
04:24

A Novel Digital Platform for a Monitored Home-based Cardiac Rehabilitation Program

Published on: April 19, 2019

12.0K
Evaluation of Hydration Status by Bioelectrical Impedance Vector Analysis in Patients with Ischemic Heart Disease Undergoing Exercise Stress Test
10:21

Evaluation of Hydration Status by Bioelectrical Impedance Vector Analysis in Patients with Ischemic Heart Disease Undergoing Exercise Stress Test

Published on: September 22, 2023

757

Area of Science:

  • Cardiology
  • Medical Devices
  • Digital Health

Background:

  • Mobile device integration for electrocardiogram (ECG) recording is rapidly advancing.
  • Current mobile ECG devices primarily assess resting conditions, with limited evaluation during physical exertion.

Purpose of the Study:

  • To compare a smartphone/tablet-enabled vectorial 4-electrode ECG system (SPE) against the standard 12-lead ECG (STE).
  • To evaluate the diagnostic accuracy and signal quality of the SPE system during both rest and maximal exercise.

Main Methods:

  • 428 patients underwent simultaneous ECG recordings using both SPE and STE systems.
  • Blinded cardiologists assessed diagnostic accuracy and signal quality, comparing SPE performance to STE.
  • Analysis included rhythm, AV-conduction, wave duration, electrical axis, and ST-segment deviations during rest and exercise.

Main Results:

  • Both systems demonstrated good signal quality.
  • Excellent agreement between SPE and STE was observed at rest for rhythm (98%), AV-conduction (97%), and electrical axis (88-97%).
  • During exercise, 90% agreement was found for ST-deviation (>0.1 mm), with 97% agreement for ST-deviations >0.2 mm. Rhythm and intraventricular conduction detection exceeded 90% accuracy.

Conclusions:

  • A smart-device-enabled vectorial ECG system is suitable for reliable ECG interpretation in daily practice, both at rest and during exercise.
  • The system demonstrates high accuracy for rhythm and conduction abnormalities.
  • ST-deviation detection during exercise with the mobile system is less accurate than with the standard 12-lead ECG.