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Updated: Jul 13, 2026
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A New Single Chamber Implantable Defibrillator with Atrial Sensing: A Practical Demonstration of Sensing and Ease of Implantation
Published on: February 28, 2012
Inappropriate shock during left ventricular threshold measurement in a patient with coexisting ICD and a
Herzschrittmachertherapie & Elektrophysiologie
|July 25, 2007
Summary
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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