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Related Concept Videos

Disturbances in Heart Rhythm01:29

Disturbances in Heart Rhythm

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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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ECG Interpretation of Arrhythmias II: Atrial, Junctional and Ventricular Arrhythmias01:25

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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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Related Experiment Video

Updated: Mar 9, 2026

A New Single Chamber Implantable Defibrillator with Atrial Sensing: A Practical Demonstration of Sensing and Ease of Implantation
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Electromagnetic Interference in Implantable Defibrillators in Single-Engine Fixed-Wing Aircraft.

Alexandra A J de Rotte, Peter van der Kemp, Peter A Mundy

    Aerospace Medicine and Human Performance
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    Summary

    Electromagnetic interference (EMI) from single-engine aircraft avionics did not affect implantable cardio-defibrillators (ICDs). Testing confirmed that ICDs did not erroneously detect arrhythmias or deliver inappropriate therapy during flight.

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    Area of Science:

    • Aerospace Medicine
    • Biomedical Engineering
    • Cardiology

    Background:

    • Limited data exists on electromagnetic interference (EMI) affecting implantable cardio-defibrillators (ICDs) in single-engine aircraft.
    • Concerns exist regarding potential arrhythmias detection and inappropriate therapy delivery due to EMI.

    Purpose of the Study:

    • To investigate the impact of EMI from single-engine fixed-wing aircraft avionics on ICD function.
    • To determine if EMI can cause erroneous arrhythmia detection or inappropriate ICD therapy.

    Main Methods:

    • Four ICDs from different manufacturers were tested in a thorax phantom aboard a Piper Dakota aircraft.
    • Devices were programmed to maximum sensitivity for detecting electromagnetic signals during several flights.
    • Post-flight interrogation analyzed detected tachycardias and device therapies.

    Main Results:

    • A total of 11,392 minutes of device data was collected.
    • No tachycardias or inappropriate therapies were detected by any of the tested ICDs.
    • No signals indicative of EMI from aircraft avionics were registered by the devices.

    Conclusions:

    • Tested ICDs remained unaffected by electromagnetic fields from single-engine aircraft avionics.
    • EMI in this environment does not appear to pose a safety risk for passengers with ICDs.
    • Further research supports the safety of ICD patients flying in single-engine aircraft.