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Related Concept Videos

Electrocardiogram01:29

Electrocardiogram

7.1K
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...
7.1K
Electrocardiogram Fundamentals01:28

Electrocardiogram Fundamentals

1.7K
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...
1.7K
ECG Interpretation of Arrhythmias II: Atrial, Junctional and Ventricular Arrhythmias01:25

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

720
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...
720
Dysrhythmias V: Evaluating Dysrhythmias01:30

Dysrhythmias V: Evaluating Dysrhythmias

427
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...
427
ECG Interpretation of Rhythms01:24

ECG Interpretation of Rhythms

16.0K
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....
16.0K
Correlation between ECG and Cardiac Cycle01:25

Correlation between ECG and Cardiac Cycle

13.7K
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...
13.7K

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Related Experiment Video

Updated: Mar 3, 2026

Analyzing Long-Term Electrocardiography Recordings to Detect Arrhythmias in Mice
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ECG-ViEW II, a freely accessible electrocardiogram database.

Young-Gun Kim1, Dahye Shin1, Man Young Park2

  • 1Department of Biomedical Informatics, Ajou University School of Medicine, Suwon, South Korea.

Plos One
|April 25, 2017
PubMed
Summary
This summary is machine-generated.

The Electrocardiogram Vigilance with Electronic data Warehouse II (ECG-ViEW II) database offers extensive electrocardiogram (ECG) data for research. This resource enables studies on ECG changes related to patient demographics, diseases, and medications.

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Area of Science:

  • Cardiology
  • Medical Informatics
  • Data Science

Background:

  • The Electrocardiogram Vigilance with Electronic data Warehouse II (ECG-ViEW II) is a comprehensive, single-center database.
  • It contains longitudinal surface electrocardiogram (ECG) parameter data from a large patient cohort over a 19-year period.

Purpose of the Study:

  • To establish a robust, accessible database for investigating factors influencing electrocardiographic parameters.
  • To facilitate research on the impact of demographics, comorbidities, medications, and electrolyte levels on ECG findings.

Main Methods:

  • The database comprises 979,273 ECGs from 461,178 patients (June 1994 - July 2013).
  • Data include ECG parameters (intervals, axes) linked with patient demographics, clinical data, and laboratory results.
  • The database is observational and longitudinal.

Main Results:

  • The ECG-ViEW II database provides detailed electrocardiographic measurements.
  • It integrates ECG data with extensive patient clinical and demographic information.
  • This linkage allows for multifaceted analytical approaches.

Conclusions:

  • ECG-ViEW II is a valuable, freely available resource for cardiovascular research.
  • The database supports studies on the determinants of electrocardiographic variability.
  • It offers significant potential for advancing our understanding of ECG changes in diverse patient populations.