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Related Experiment Videos

A prophylactic implantable cardioverter-defibrillator?

P Brugada1, F Wellens, E Andries

  • 1Cardiovascular Research and Teaching Institute Aalst, O.L.V. Hospital, Belgium.

The American Journal of Cardiology
|September 12, 1996
PubMed
Summary

Prophylactic antiarrhythmic drugs are ineffective for high-risk patients. Implantable cardioverter-defibrillators (ICDs) are effective for preventing sudden cardiac death in patients with prior arrhythmias.

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Area of Science:

  • Cardiology
  • Medical Devices

Background:

  • Antiarrhythmic drugs have shown poor efficacy and potential harm when used prophylactically in high-risk patients without prior ventricular arrhythmias.
  • Ethical considerations and lack of placebo-controlled trials prevent evaluating antiarrhythmic drugs in patients with a history of sudden cardiac death or sustained ventricular arrhythmias.

Purpose of the Study:

  • To evaluate the role of prophylactic implantable cardioverter-defibrillators (ICDs) in preventing sudden cardiac death.
  • To address the challenges and justify the use of ICDs in specific patient populations.

Main Methods:

  • Review of existing data on antiarrhythmic drug efficacy and sudden cardiac death.
  • Analysis of the predictability and incidence of sudden death in different risk groups.
  • Discussion of the technical, ethical, and financial aspects of prophylactic ICD implantation.

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Main Results:

  • Prophylactic antiarrhythmic drugs have failed to improve outcomes and may worsen prognosis in high-risk patients.
  • Sudden cardiac death is predictable in certain patient groups, with a high incidence.
  • Implantable cardioverter-defibrillators (ICDs) are effective in recognizing and treating ventricular fibrillation, the common final pathway of sudden cardiac death.

Conclusions:

  • There is an urgent need for prophylactic ICD implantation in patients at high risk of sudden cardiac death.
  • While obstacles exist, the effectiveness of ICD therapy justifies its use.
  • Decisions regarding prophylactic ICDs involve probabilistic assessments and require addressing financial and political considerations.