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Related Experiment Videos

An unusual electrocardiogram artifact: what is its source?

Nischita K Reddy1, Ramanna Merla, Nonko D Pehlivanov

  • 1Department of Neurology, The University of Texas Medical Branch, Galveston, TX 77555-0553, USA.

Journal of Electrocardiology
|October 12, 2005
PubMed
Summary

A diabetic patient experienced nausea and vomiting due to a malfunctioning gastric pacemaker. A recent DC shock for ventricular fibrillation disrupted the device, impacting her diabetic gastroparesis treatment.

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Area of Science:

  • Cardiology
  • Gastroenterology
  • Biomedical Engineering

Background:

  • Diabetic gastroparesis is a common complication of diabetes mellitus, often managed with gastric electrical stimulation (GES).
  • Gastric electrical stimulation systems are implanted devices designed to improve gastric motility.
  • Patients with diabetes are at increased risk for cardiac arrhythmias and may require interventions like defibrillation.

Observation:

  • A patient with diabetic gastroparesis presented with nausea and vomiting.
  • Electrocardiogram (ECG) revealed artifactual spikes unrelated to cardiac activity.
  • The patient had a history of coronary angiography complicated by ventricular fibrillation requiring direct current (DC) shock.

Findings:

  • The patient's implanted gastric electrical stimulation system malfunctioned following a recent DC shock.

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  • The artifactual spikes on the ECG were attributed to the malfunctioning gastric pacemaker.
  • The malfunction led to the patient's gastrointestinal symptoms.

    • Implications:

    • Direct current shocks can interfere with the function of implanted electronic medical devices like gastric pacemakers.
    • Careful consideration of potential device interactions is crucial in patients with implanted systems undergoing electrical therapies.
    • This case highlights the importance of device interrogation after electrical interventions in patients with GES systems.