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Reduction of inappropriate ICD therapies in patients with primary prevention of sudden cardiac death: DECREASE study.

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PubMed
Summary

Progressive implantable cardioverter-defibrillator (ICD) programming significantly reduces inappropriate shocks and therapies in primary prevention patients. This advanced programming is particularly effective in devices with dual-chamber detection capabilities.

Keywords:
Implantable cardioverter defibrillatorInappropriate therapyPrimary preventionSudden cardiac death

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Area of Science:

  • Cardiology
  • Biomedical Engineering
  • Clinical Electrophysiology

Background:

  • Many patients with implantable cardioverter-defibrillators (ICDs) for primary prevention experience inappropriate shocks.
  • Previous studies showed potential benefits of modifying ICD detection settings, but with varied criteria and programming.
  • A need exists to evaluate optimized ICD detection strategies across a broad primary prevention population.

Purpose of the Study:

  • To investigate the impact of elevated ICD detection zones on inappropriate therapies and shocks.
  • To assess the efficacy of progressive ICD programming in primary prevention patients.
  • To compare progressive versus conventional ICD programming strategies.

Main Methods:

  • A randomized trial involving 543 primary prevention ICD patients.
  • Patients were assigned to either conventional or progressive ICD programming groups.
  • Progressive programming involved higher detection rates for ventricular tachycardia (VT) and ventricular fibrillation (VF).

Main Results:

  • The progressive programming group showed a significantly lower incidence of the primary endpoint (inappropriate therapies and untreated VT/VF) (6% vs. 13%, p=0.004).
  • Progressive ICD programming resulted in fewer patients receiving therapies (14% vs. 26%, p<0.001) and shocks (5% vs. 11%, p=0.023).
  • Dual-chamber detection devices demonstrated the greatest reduction in inappropriate therapies and shocks with progressive programming.

Conclusions:

  • Progressive ICD programming is an effective strategy for reducing inappropriate therapies and shocks in primary prevention patients.
  • The benefits of progressive programming are particularly pronounced in patients with dual-chamber detection devices.
  • Optimizing ICD detection settings can enhance patient safety and device efficacy.