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Electromagnetic Interference from Swimming Pool Generator Current Causing Inappropriate ICD Discharges.

Edward Samuel Roberto^1,2, Thein Tun Aung^1,2, Atif Hassan³

¹Wright State University Boonshoft School of Medicine, Dayton, OH, USA.

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|September 16, 2017

Summary

This summary is machine-generated.

Electromagnetic interference (EMI) from a submerged motor caused inappropriate implantable cardioverter-defibrillator (ICD) shocks in a patient. Avoiding the source of this extracardiac EMI completely resolved the issue, preventing further shocks.

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Area of Science:

Cardiology
Biomedical Engineering
Environmental Health

Background:

Electromagnetic interference (EMI) poses risks to cardiac implantable electronic devices (CIEDs), potentially causing critical malfunctions.
Implantable cardioverter-defibrillators (ICDs) are susceptible to external electromagnetic fields, leading to inappropriate shocks.

Observation:

A patient with arrhythmogenic right ventricular cardiomyopathy and an ICD experienced multiple inappropriate shocks at a public swimming pool.
Intracardiac electrograms showed high-frequency signals consistent with extracardiac EMI, specifically alternating current leakage from a submerged motor.
Device diagnostics and intracardiac sources were ruled out, strongly implicating external EMI.

Findings:

The extracardiac EMI was identified as alternating current leakage from a submerged motor used in pool water recycling.
This interference was misinterpreted by the ICD as a ventricular arrhythmia, triggering inappropriate shocks.
Normal device parameters excluded device malfunction or abnormal settings as the cause.

Implications:

External electromagnetic interference must be considered in cases of unexplained ICD inappropriate shocks.
Identifying and eliminating the source of extracardiac EMI is crucial for patient safety and preventing harm.
This case highlights the importance of a thorough differential diagnosis for CIED malfunctions, including environmental factors.