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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
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
Dysrhythmias IV: Characteristics of Bradyarrhythmias01:18

Dysrhythmias IV: Characteristics of Bradyarrhythmias

224
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...
224
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...
162
Disturbances in Heart Rhythm01:29

Disturbances in Heart Rhythm

1.7K
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...
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Related Experiment Video

Updated: Oct 26, 2025

Ablation of Ischemic Ventricular Tachycardia Using a Multipolar Catheter and 3-dimensional Mapping System for High-density Electro-anatomical Reconstruction
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Ablation of Ischemic Ventricular Tachycardia Using a Multipolar Catheter and 3-dimensional Mapping System for High-density Electro-anatomical Reconstruction

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de Winter Electrocardiographic Pattern Caused by Diagonal Branch Lesion.

Yuzo Hirase1, Minoru Wake1, Kazuhito Hirata1

  • 1Division of Cardiology, Okinawa Chubu Hospital, Uruma, Okinawa, Japan.

JACC. Case Reports
|July 28, 2021
PubMed
Summary

A woman experienced acute coronary syndrome due to spontaneous coronary artery dissection. Her de Winter electrocardiogram pattern resolved spontaneously, highlighting a transient cardiac event.

Keywords:
AV, atrioventricularCAG, coronary angiographyECG, electrocardiogramLAD, left anterior descendingLAO, left anterior obliqueMI, myocardial infarctionRAO, right anterior obliqueRCA, right coronary arterySCAD, spontaneous coronary artery dissectionTIMI, Thrombolysis In Myocardial Infarctionacute myocardial infarctionde Winter patternspontaneous coronary artery dissection

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

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Area of Science:

  • Cardiology
  • Internal Medicine

Background:

  • Spontaneous coronary artery dissection (SCAD) is a rare cause of acute coronary syndrome.
  • The de Winter electrocardiogram pattern typically indicates acute myocardial ischemia.

Purpose of the Study:

  • To report a case of acute coronary syndrome with a de Winter electrocardiogram pattern caused by SCAD.
  • To describe the transient nature of this specific ECG presentation.

Main Methods:

  • Case report of a middle-aged woman presenting with chest pain.
  • Electrocardiogram (ECG) monitoring and coronary angiography.
  • Follow-up ECG to assess resolution of ischemic changes.

Main Results:

  • The patient presented with de Winter ECG changes, indicative of acute coronary syndrome.
  • Coronary angiography identified a dissection in a diagonal branch artery as the cause.
  • ECG abnormalities resolved spontaneously within 2 hours without intervention.

Conclusions:

  • SCAD can present with the de Winter ECG pattern, mimicking other forms of acute coronary syndrome.
  • The de Winter pattern in SCAD may be transient and resolve without specific cardiac intervention.
  • This case underscores the importance of considering SCAD in the differential diagnosis of acute coronary syndromes with specific ECG findings.