Complications associated with generator replacement in response to device advisories

Area of Science:

• Cardiology
• Biomedical Engineering
• Medical Device Safety

Background:

• Device recalls, particularly for implantable cardioverter defibrillators (ICDs) and pacemakers, pose significant challenges for both patients and physicians.
• The risks associated with device replacement can potentially outweigh the risks of device failure.
• In 2005, major manufacturers like Medtronic, Guidant, and St. Jude experienced recalls, highlighting a lack of standardized patient management protocols.

Purpose of the Study:

• To analyze the reasons behind and outcomes of pacemaker and ICD generator changes prompted by manufacturer advisories.
• To evaluate the complication rates associated with device replacement following recalls.

Main Methods:

• Patients with recalled devices were contacted and evaluated by electrophysiologists.
• A management plan, including device replacement, was determined for each patient.
• Outcomes and complication rates of generator replacements were retrospectively analyzed.

Main Results:

• 21.4% of patients (222 out of 1,039) with advisory-affected devices underwent generator replacement.
• Nine minor complications (hematoma, local discomfort, incisional infections) were reported.
• Nine major complications (lead damage, loose set screw, hematoma requiring evacuation, pocket revision, preoperative cerebrovascular accident) occurred in 4.1% of patients.

Conclusions:

• Generator replacement due to device recalls, even by experienced operators, carries inherent risks.
• Individual patient risk assessment is paramount before deciding on device replacement.
• Minimizing unnecessary generator changes is essential to mitigate potential complications.