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Related Concept Videos

Electrocardiogram01:29

Electrocardiogram

4.8K
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...
4.8K
Correlation between ECG and Cardiac Cycle01:25

Correlation between ECG and Cardiac Cycle

10.8K
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...
10.8K
Electrocardiogram Fundamentals01:28

Electrocardiogram Fundamentals

1.2K
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...
1.2K
Acute Coronary Syndrome III: Diagnostic Studies01:30

Acute Coronary Syndrome III: Diagnostic Studies

112
Diagnosing acute coronary syndrome or ACS begins with a thorough patient history. Notable symptoms include central, crushing chest pain radiating to the left arm, neck, jaw, or back, along with shortness of breath, sweating (diaphoresis), nausea, vomiting, dizziness, and palpitations.It is crucial to note any history of cardiac illnesses and assess risk factors, including age, gender, smoking, hypertension, diabetes, hyperlipidemia, and a sedentary lifestyle.During physical examination, vital...
112
Aortic Regurgitation II: Clinical Features and Diagnostic Tests01:22

Aortic Regurgitation II: Clinical Features and Diagnostic Tests

233
Aortic valve regurgitation (AR) occurs when the aortic valve fails to close properly, allowing blood to flow backward from the aorta into the left ventricle. This backflow can result in two distinct clinical presentations: acute and chronic AR, each characterized by its own set of symptoms and physical findings.Acute Aortic RegurgitationAcute AR presents with a sudden onset of severe symptoms. Patients typically experience profound dyspnea (shortness of breath), chest pain, and signs of left...
233
ECG Interpretation of Arrhythmias II: Atrial, Junctional and Ventricular Arrhythmias01:25

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

287
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...
287

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Related Experiment Video

Updated: Dec 2, 2025

Real-Time Cardiac Mapping with a Noninvasive Imageless Electrocardiographic Imaging System
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Real-Time Cardiac Mapping with a Noninvasive Imageless Electrocardiographic Imaging System

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Artificial Intelligence ECG to Detect Left Ventricular Dysfunction in COVID-19: A Case Series.

Zachi I Attia1, Suraj Kapa1, Peter A Noseworthy1

  • 1Department of Cardiovascular Medicine, Mayo Clinic, Rochester, MN.

Mayo Clinic Proceedings
|November 6, 2020
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Summary

Artificial intelligence electrocardiogram (AI ECG) shows promise in detecting cardiac dysfunction in COVID-19 patients. This AI tool may help identify ventricular dysfunction, guiding crucial management decisions for better patient outcomes.

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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
  • Artificial Intelligence
  • Infectious Diseases

Background:

  • COVID-19 can lead to cardiac dysfunction and increased mortality.
  • Early detection of ventricular dysfunction is crucial for managing COVID-19 patients.
  • A point-of-care diagnostic tool for cardiac screening in COVID-19 is needed.

Purpose of the Study:

  • To evaluate the clinical utility of an artificial intelligence electrocardiogram (AI ECG) for screening ventricular dysfunction in COVID-19 patients.
  • To assess the accuracy of AI ECG in identifying reduced ejection fraction (EF) in this population.

Main Methods:

  • Retrospective review of patients within the Mayo Clinic system.
  • Inclusion criteria: positive COVID-19 test, electrocardiography and echocardiography within 2 weeks, and data use permission.
  • Analysis of AI ECG performance in detecting ejection fraction (EF) ≤ 40%.

Main Results:

  • AI ECG accurately detected low EF in patients with COVID-19 related myocarditis and pre-existing cardiac conditions.
  • The area under the curve (AUC) for detecting EF ≤ 40% was 0.95.
  • AI ECG identified cardiac dysfunction in a case series of 27 COVID-19 patients.

Conclusions:

  • AI ECG demonstrates potential as a screening tool for cardiac dysfunction in COVID-19 patients.
  • This technology may aid in the early identification and management of ventricular dysfunction.
  • Further research is warranted to validate AI ECG's role in COVID-19 cardiac care.