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The association of J wave and ventricular tachycardia before device implantation with device interventions for

Hideki Hayashi1, Minoru Horie1

  • 1Department of Cardiovascular and Respiratory Medicine, Shiga University of Medical Science, Otsu, Japan.

Journal of Electrocardiology
|May 19, 2015
PubMed

Insights

J waves and a history of ventricular tachycardia (VT) predict future defibrillator interventions in patients with implanted devices. These findings aid in assessing arrhythmia risk and guiding treatment strategies.

Area of Science:

  • Cardiology
  • Electrophysiology
  • Medical Devices

Background:

  • J waves are linked to life-threatening ventricular arrhythmias in various heart conditions.
  • A prior diagnosis of ventricular tachycardia (VT) is a known risk factor for future arrhythmic events.

Purpose of the Study:

  • To identify prognostic factors for ventricular tachyarrhythmias in patients with implanted defibrillators.

Main Methods:

  • Analysis of intracardiac electrograms in patients with implantable cardioverter-defibrillators (ICDs) or cardiac resynchronization therapy with a defibrillator (CRT-D).
  • Retrospective evaluation using multivariate Cox proportional hazards models to assess the relationship between clinical characteristics and device interventions for ventricular tachyarrhythmias.

Main Results:

  • The study included 160 patients with a mean follow-up of 44 months.
  • J waves were present in 19% and documented VT in 48% of patients prior to device implantation.
  • J waves (HR, 2.90) and prior VT (HR, 4.34) were independent predictors of device intervention, even after adjusting for confounders.

Conclusions:

  • J waves and a documented history of VT are independent predictors of future device interventions for ventricular tachyarrhythmias.
  • These factors are crucial for risk stratification in patients with implanted defibrillators.
Abstract

Keywords:
Cardiac resynchronization therapy-defibrillatorElectrocardiogramImplantable cardioverter-defibrillatorJ waveVentricular tachycardia

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