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"An AVID dissent": commentary

S J Connolly1

  • 1Department of Medicine, McMaster University, Ontario, Canada.

Pacing and Clinical Electrophysiology : PACE
|November 1, 1994
PubMed
Summary
This summary is machine-generated.

Randomized trials are needed to confirm if implantable cardioverter-defibrillators (ICDs) effectively reduce mortality in high-risk patients, despite current suggestive data. These studies will clarify ICD effectiveness for critical patient groups.

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Area of Science:

  • Cardiology
  • Medical Devices
  • Clinical Trials

Background:

  • Current data suggest implantable cardioverter-defibrillators (ICDs) are effective for preventing sudden cardiac death.
  • However, existing evidence primarily comes from nonrandomized observational studies, which have inherent limitations in reliability.

Discussion:

  • Randomized trials, including AVID, CIDS, and CASH, are ethically justified and crucial for definitive assessment of ICD efficacy.
  • These trials have established reasonable patient eligibility criteria and primary endpoints.

Key Insights:

  • The reliability of nonrandomized studies is insufficient to conclusively determine ICD effectiveness.
  • High-risk cardiac patients require robust evidence regarding ICDs' impact on mortality.

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Outlook:

  • Completion of ongoing randomized trials (AVID, CIDS, CASH) is expected to provide clear answers on ICDs' life-saving potential.
  • These studies will guide clinical practice and patient selection for ICD implantation.