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Inappropriate shock during left ventricular threshold measurement in a patient with coexisting ICD and a

M Azizi1, H Nägele

  • 1St. Adolfstift, Medical Clinic, Hamburgerstr. 41, 21465 Reinbek, Germany.

Herzschrittmachertherapie & Elektrophysiologie
|July 25, 2007
PubMed

Insights

An inappropriate defibrillator shock occurred during biventricular pacemaker testing in a patient with two separate cardiac devices. This highlights potential system interactions requiring careful management for effective heart failure therapy.

Area of Science:

  • Cardiology
  • Biomedical Engineering

Background:

  • Cardiac resynchronization therapy (CRT) with biventricular pacing is standard for heart failure patients with conduction delays.
  • Some patients require separate implantable cardioverter-defibrillator (ICD) and biventricular pacemaker systems.

Observation:

  • This case report details an unusual interaction between a biventricular pacemaker and an ICD.
  • An inappropriate VVI defibrillator shock was observed during left ventricular threshold measurement.

Findings:

  • The interaction occurred due to the presence of two separate cardiac electronic devices.
  • Testing of one device (biventricular pacemaker) triggered an adverse event from the other (ICD).

Implications:

  • Highlights the need for awareness of potential device interactions in patients with multiple cardiac devices.
  • Suggests careful programming and testing protocols are essential to prevent inappropriate shocks during device management.
  • Underscores the importance of considering device compatibility and potential electromagnetic interference in complex cardiac device patients.

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