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Related Concept Videos

Electrocardiogram01:29

Electrocardiogram

7.2K
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...
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Electrocardiogram Fundamentals01:28

Electrocardiogram Fundamentals

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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...
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Related Experiment Video

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High-Throughput Analysis of Optical Mapping Data Using ElectroMap
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Electrocardiogram reconstruction from high resolution voltage optical mapping.

Ilija Uzelac, Conner Herndon, James Farmer

    Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference
    |March 9, 2017
    PubMed
    Summary
    This summary is machine-generated.

    This study validates Optical Mapping ECG (OM-ECG) against standard ECGs. OM-ECG accurately reconstructs cardiac electrical activity, offering artifact-free data crucial for defibrillation studies and intramural dynamics research.

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    Area of Science:

    • Cardiovascular Physiology
    • Biomedical Engineering
    • Computational Biology

    Background:

    • Electrocardiograms (ECGs) are vital for monitoring heart tissue health and studying arrhythmias.
    • Optical mapping provides detailed cardiac electrical activity data, but ECG reconstruction from it remains underexplored and unvalidated.
    • Standard ECGs suffer from artifacts, particularly during defibrillation events.

    Purpose of the Study:

    • To rigorously validate and compare Optical Mapping ECG (OM-ECG) with standard ECG recordings.
    • To detail methods for reconstructing unipolar and bipolar ECGs from optical mapping data.
    • To explore the applications of OM-ECG in cardiac electrophysiology research.

    Main Methods:

    • Calculating electrostatic potential from optical voltage measurements to reconstruct ECGs.
    • Comparing OM-ECG with standard ECGs in rabbit ventricles under various conditions (normal, ischemic).
    • Analyzing the impact of optical mapping surface coverage (anterior/posterior) on OM-ECG accuracy.

    Main Results:

    • OM-ECG closely matches standard ECGs in small/medium hearts, with accuracy depending on lead orientation and mapping coverage.
    • Ischemic conditions improve OM-ECG accuracy, potentially requiring only single-surface recordings.
    • OM-ECG successfully captures fine details, like pacing artifacts, absent in standard ECGs during defibrillation.

    Conclusions:

    • OM-ECG is a validated method for reconstructing cardiac electrical activity from optical mapping data.
    • OM-ECG offers significant advantages over standard ECGs, especially during defibrillation studies, by avoiding shock artifacts.
    • This technique enables novel insights into cardiac dynamics, including intramural activation patterns and defibrillation efficacy.