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Implementation of lead safety recommendations.

Johannes B VAN Rees1, C Jan Willem Borleffs, Jeroen J Bax

  • 1Department of Cardiology, Leiden University Medical Center, Leiden, The Netherlands.

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Summary
This summary is machine-generated.

Medtronic Sprint Fidelis lead failures increased, but advisories reduced inappropriate shocks. Patient safety was improved by device setting adjustments and lead integrity algorithms.

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Area of Science:

  • Cardiology
  • Biomedical Engineering
  • Medical Device Safety

Background:

  • The Medtronic Sprint Fidelis (SF) implantable cardioverter defibrillator (ICD) lead exhibited a higher-than-expected failure rate.
  • Medtronic issued two patient safety advisories: device setting adjustments (October 2007) and a lead integrity algorithm (May 2008).

Purpose of the Study:

  • To evaluate the impact of Medtronic's advisories on patient safety concerning the SF lead.
  • Assessed the effectiveness of implemented safety measures in mitigating risks associated with lead failure.

Main Methods:

  • Compared lead failure rates and inappropriate shocks due to lead failure across three distinct periods.
  • Analyzed data from 372 patients implanted with SF leads between December 2004 and April 2009.
  • Evaluated event rates before and after the implementation of both advisories.

Main Results:

  • Cumulative incidence of SF lead failure increased over time, reaching 11.0% at 42 months.
  • Following the implementation of both advisories, inappropriate shocks due to lead failure decreased from 1.5 to 0.8 per 100 lead-years.
  • The study observed a reduction in adverse events post-advisory implementation.

Conclusions:

  • Despite the persistent risk of SF lead failure, the advisories effectively reduced the incidence of inappropriate shocks.
  • Implementation of device setting adjustments and lead integrity algorithms enhanced patient safety.
  • The findings support the efficacy of proactive safety measures in managing high-risk medical devices.