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Related Concept Videos

Electrocardiogram01:29

Electrocardiogram

7.4K
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...
7.4K
Electrocardiogram Fundamentals01:28

Electrocardiogram Fundamentals

1.8K
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...
1.8K
Correlation between ECG and Cardiac Cycle01:25

Correlation between ECG and Cardiac Cycle

14.3K
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...
14.3K
ECG Interpretation of Rhythms01:24

ECG Interpretation of Rhythms

17.4K
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....
17.4K
Dysrhythmias III: Characteristics of Dysrhythmias01:29

Dysrhythmias III: Characteristics of Dysrhythmias

641
Dysrhythmias, also known as arrhythmias, are irregular heart rhythms that result from abnormal electrical activity in the heart, affecting its ability to circulate blood efficiently. Tachyarrhythmias, a subset of dysrhythmias, are characterized by abnormally fast heart rates exceeding 100 beats per minute. Here are some types of tachyarrhythmias with their distinct ECG features:Sinus Tachycardia:Sinus tachycardia presents a regular heart rhythm with an increased rate of 101-180 beats per...
641
ECG Interpretation of Arrhythmias II: Atrial, Junctional and Ventricular Arrhythmias01:25

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

814
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...
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Concurrent Electroencephalography Recording During Transcranial Alternating Current Stimulation tACS
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Concurrent Electroencephalography Recording During Transcranial Alternating Current Stimulation tACS

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Pseudo-double T wave ECG artifact.

Ling S Ong1, S Serge Barold2

  • 1Cardiology Division, Rochester General Hospital, Rochester, NY, USA.

Herzschrittmachertherapie & Elektrophysiologie
|July 14, 2016
PubMed
Summary
This summary is machine-generated.

A double T wave on an electrocardiogram (ECG) in a diabetic patient was an artifact, not myocardial ischemia. Proper ECG analysis is crucial for distinguishing true findings from pseudo double T waves.

Keywords:
Coronary artery diseaseElectrocardiographic artifactsElectrocardiographyRepolarization abnormalities

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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
  • Medical Diagnostics
  • Biomedical Engineering

Background:

  • Electrocardiograms (ECG) are vital for diagnosing cardiac conditions.
  • Diabetic patients are at higher risk for cardiovascular disease.
  • Interpreting ECG findings requires expertise to differentiate abnormalities from artifacts.

Observation:

  • A unique "double T wave" pattern was observed on an ECG of a diabetic patient.
  • The patient had no history of coronary artery disease.
  • The ECG returned to normal the following day.

Findings:

  • The observed double T wave was identified as a "pseudo double T wave" artifact.
  • This artifact is not indicative of myocardial ischemia or other repolarization abnormalities.
  • The exact cause remains unknown but is likely related to the electrode-skin interface.

Implications:

  • Misinterpretation of pseudo double T waves can lead to unnecessary patient anxiety and further testing.
  • Highlights the importance of meticulous ECG tracing examination.
  • Emphasizes the need for a deep understanding of normal ECG patterns and potential artifacts in clinical practice.