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Related Concept Videos

Electrocardiogram01:29

Electrocardiogram

4.1K
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...
4.1K
Electrocardiogram Fundamentals01:28

Electrocardiogram Fundamentals

1.0K
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...
1.0K
Cardiac Action Potential01:30

Cardiac Action Potential

3.8K
Cardiac action potentials are essential for proper heart function, enabling the rhythmic contractions needed for adequate blood circulation. Nodal cells and Purkinje fibers, specialized for electrical conduction, generate these action potentials.
The cardiac action potential process involves a series of phases characterized by the movement of ions across the cardiac cell membranes, leading to the depolarization and repolarization of the cardiac myocytes.
Ionic Basis of Cardiac Action Potentials
3.8K
ECG Interpretation of Arrhythmias II: Atrial, Junctional and Ventricular Arrhythmias01:25

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

215
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...
215
ECG Interpretation of Rhythms01:24

ECG Interpretation of Rhythms

6.6K
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....
6.6K
Dysrhythmias V: Evaluating Dysrhythmias01:30

Dysrhythmias V: Evaluating Dysrhythmias

162
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...
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Related Experiment Video

Updated: Oct 26, 2025

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

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Occluded or Not?: A Subtle Electrocardiographic Answer.

Anne-Flore Plane1, Xavier Valette2, Katrien Blanchart1

  • 1Department of Cardiology, Caen University Hospital, Caen, France.

JACC. Case Reports
|July 28, 2021
PubMed
Summary

A specific electrocardiogram pattern, known as de Winter syndrome, indicates a critical blockage in the left anterior descending coronary artery. This finding is crucial for diagnosing acute cardiac events following resuscitation.

Keywords:
ECG, electrocardiographicLAD, left anterior descending coronary arteryanterior myocardial infarctionde Winter patternelectrocardiogram

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A Research Method For Detecting Transient Myocardial Ischemia In Patients With Suspected Acute Coronary Syndrome Using Continuous ST-segment Analysis
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Analyzing Long-Term Electrocardiography Recordings to Detect Arrhythmias in Mice
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Area of Science:

  • Cardiology
  • Emergency Medicine
  • Medical Diagnostics

Background:

  • The case report focuses on a unique electrocardiogram (ECG) finding in a patient who underwent cardiopulmonary resuscitation.
  • The electrocardiographic pattern observed is associated with specific coronary artery pathologies.

Purpose of the Study:

  • To describe a rare electrocardiographic pattern indicative of de Winter syndrome.
  • To highlight the association between this ECG pattern and proximal left anterior descending coronary artery occlusion.

Main Methods:

  • Case report of a 48-year-old male patient.
  • Analysis of electrocardiogram findings post-cardiopulmonary resuscitation.
  • Correlation of ECG findings with coronary artery anatomy.

Main Results:

  • The patient's ECG showed up-sloping ST-segment depression at the J point in precordial leads.
  • Tall, symmetrical T waves were also noted on the ECG.
  • This pattern was identified as de Winter syndrome.

Conclusions:

  • The de Winter ECG pattern is a critical indicator of proximal left anterior descending coronary artery occlusion.
  • Prompt recognition of this pattern is essential for timely intervention in patients presenting with cardiac arrest.