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ICD malfunction caused by excessive defibrillation charge time.

A de Meester¹, P H Gilles

¹Cardiology Department, Jolimont Hospital, 7100 Haine Saint Paul, Belgium.

Pacing and Clinical Electrophysiology : PACE

|May 9, 2001

Summary

Delayed therapy from an implantable cardioverter-defibrillator (ICD) occurred due to excessive charge times. This rare malfunction necessitated generator replacement, highlighting charge time as a critical factor in ICD performance.

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Area of Science:

Cardiology
Biomedical Engineering

Background:

Implantable cardioverter-defibrillators (ICDs) are crucial for managing life-threatening ventricular arrhythmias.
Patients with a history of myocardial infarction and ventricular tachycardia often receive ICDs for primary or secondary prevention.

Observation:

A 71-year-old male patient experienced progressively increasing defibrillation charge times on his ICD.
The patient collapsed during a fast ventricular tachycardia episode, with telemetric interrogation revealing an excessive ICD charge time.

Findings:

The prolonged ICD charge time resulted in delayed defibrillation therapy.
This malfunction rendered the ICD potentially ineffective, leading to a recommendation for generator exchange.

Implications:

Related Experiment Videos

Excessive charge time is an underrecognized cause of ICD malfunction.
Regular monitoring of ICD charge times is essential for ensuring device efficacy and patient safety.
This case underscores the need for prompt generator replacement when such anomalies are detected.