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Sleep disordered breathing is associated with appropriate implantable cardioverter defibrillator therapy in

Luca Tomaello1, Luisa Zanolla, Corrado Vassanelli

  • 1Department of Biomedical and Surgical Sciences, University of Verona, Italy. luca.tomaello@libero.it

Clinical Cardiology
|January 1, 2010
PubMed

Insights

Sleep disordered breathing (SDB) affects most patients with implantable cardioverter defibrillators (ICDs) and congestive heart failure (CHF). SDB severity correlates with appropriate ICD shocks, indicating increased arrhythmia risk.

Area of Science:

  • Cardiology
  • Sleep Medicine
  • Medical Devices

Background:

  • Implantable cardioverter defibrillators (ICDs) are common in congestive heart failure (CHF) patients.
  • Sleep disordered breathing (SDB) is prevalent in this patient population.

Purpose of the Study:

  • To determine the prevalence of SDB in CHF patients with ICDs.
  • To assess the impact of SDB on appropriate ICD discharges.

Main Methods:

  • Polysomnography was used to study 22 consecutive patients with systolic CHF (LVEF < 45%) and ICDs.

Main Results:

  • SDB was detected in 77.2% of patients (AHI ≥ 10 events/hour).
  • Apnea-hypopnea index (AHI) and sleep hypoxia severity correlated with appropriate ICD discharges, independent of LVEF and NYHA class.

Conclusions:

  • SDB is frequent in ICD recipients with systolic CHF.
  • SDB may elevate the risk of ventricular arrhythmias and necessitate appropriate ICD interventions.
Abstract

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