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Methods for ECG Evaluation of Indicators of Cardiac Risk, and Susceptibility to Aconitine-induced Arrhythmias in Rats Following Status Epilepticus
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[Prospective long-term ECG study of 100 patients surviving sudden cardiac death]

J Herms1, J Siebels, M Schneider

  • 1Abteilung für Kardiologie der II. Medizinischen Klinik, Universitätskrankenhaus Eppendorf, Hamburg.

Zeitschrift Fur Kardiologie
|December 1, 1992
PubMed

Insights

Sudden cardiac death survivors treated with Amiodarone or Metoprolol showed reduced relapse rates. Ventricular ectopic activity

Area of Science:

  • Cardiology
  • Clinical Electrophysiology

Background:

  • Sudden cardiac death (SCD) survivors often exhibit ventricular ectopic activity.
  • The prognostic significance of this activity can be influenced by antiarrhythmic treatment.

Purpose of the Study:

  • To evaluate the impact of different antiarrhythmic drugs and an automatic implantable cardioverter/defibrillator (AICD) on ventricular ectopic activity and arrhythmia relapse in SCD survivors.

Main Methods:

  • 100 SCD survivors were randomized into four groups: Amiodarone, Propafenone, Metoprolol, or AICD (control).
  • Prospective Holter-monitoring was used to assess ventricular ectopic activity (frequency and complexity).
  • Two-year relapse rates for life-threatening ventricular tachyarrhythmias were recorded.

Main Results:

  • Frequent and complex ventricular ectopic activity predicted relapse in the AICD control group (>= 25 VES/h).
  • Amiodarone significantly reduced ventricular ectopic activity and the 2-year relapse rate (12%) compared to AICD (36%).
  • Metoprolol increased ectopic activity but also reduced relapse rates (12%), while Propafenone showed a high relapse rate (28%) in patients with low ectopic activity.

Conclusions:

  • Prophylactic antiarrhythmic treatment significantly modifies the prognostic value of ventricular ectopic activity in SCD survivors.
  • Amiodarone and Metoprolol demonstrate efficacy in reducing relapse rates, with Amiodarone also decreasing ectopic activity.
  • Propafenone may pose a risk for certain patient subgroups, highlighting the need for personalized treatment strategies.

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