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Related Experiment Videos

Is defibrillation testing required for defibrillator implantation?

S Adam Strickberger1, George J Klein

  • 1Division of Cardiology, Washington Hospital Center, Washington, DC, USA. strickberger@medstar.net

Journal of the American College of Cardiology
|July 6, 2004
PubMed
Summary

Defibrillation threshold (DFT) testing during implantable cardioverter-defibrillator (ICD) implantation is debated. While modern devices lower DFTs, evidence is needed to confirm safety and efficacy if DFT testing is abandoned.

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Area of Science:

  • Cardiology
  • Biomedical Engineering

Background:

  • Defibrillation threshold (DFT) testing has been standard for implantable cardioverter-defibrillator (ICD) implantation.
  • Historically, achieving an adequate DFT safety margin often required adjustments to shock polarity or electrode configuration.
  • Advances in ICD and lead technology have led to lower and more consistent DFTs, reducing the need for modifications.

Purpose of the Study:

  • To evaluate the arguments for and against continuing DFT testing during ICD implantation.
  • To review data supporting and refuting the necessity of intraoperative DFT testing.

Main Methods:

  • Review of existing data and scientific arguments regarding DFT testing.
  • Analysis of the safety and mortality benefits of ICD implantation with versus without DFT testing.

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Main Results:

  • Modern ICD technology has improved DFT predictability, making testing less frequently necessary.
  • The continuation of DFT testing is debated, with potential benefits in ensuring efficacy versus potential barriers to therapy access.

Conclusions:

  • Abandoning DFT testing requires prospective evidence demonstrating equivalent safety and mortality benefits compared to testing.
  • Alternative strategies may enhance access to ICD therapy without compromising effectiveness.
  • The impact of discontinuing DFT testing on patient survival and therapy effectiveness remains a critical question.