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Immediate Risk-Stratification Improves Survival (IRIS): study protocol.

Gerhard Steinbeck1, Dietrich Andresen, Jochen Senges

  • 1Department of Internal Medicine I, Ludwigs-Maximilians-University of Munich, Klinikum Grosshadern, Marchioninistrasse 15, 81377 Munich, Germany. gerhard.steinbeck@med.uni-muenchen.de

Europace : European Pacing, Arrhythmias, and Cardiac Electrophysiology : Journal of the Working Groups on Cardiac Pacing, Arrhythmias, and Cardiac Cellular Electrophysiology of the European Society of Cardiology
|August 6, 2004
PubMed
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The Immediate Risk-Stratification Improves Survival (IRIS) study investigates implantable cardioverter-defibrillators (ICDs) for high-risk heart attack patients. Early ICD use may reduce overall mortality in these patients.

Area of Science:

  • Cardiology
  • Clinical Trials
  • Medical Devices

Background:

  • Implantable cardioverter-defibrillators (ICDs) are proven for primary prevention of sudden cardiac death (SCD) in specific chronic post-myocardial infarction (MI) patients.
  • Limited data exists on ICD efficacy in high-risk patients during the early phase after MI.

Purpose of the Study:

  • To evaluate the efficacy of ICD therapy in reducing overall mortality in high-risk patients early after acute myocardial infarction (MI).
  • To assess the benefit of ICD implantation in conjunction with optimal medical therapy.

Main Methods:

  • The Immediate Risk-Stratification Improves Survival (IRIS) Study is a large-scale, prospective, randomized trial.
  • Patients with acute ST-elevation or non-ST-elevation MI were enrolled early (days 5-31) if they met specific criteria: LVEF ≤40% with HR ≥100 bpm, or non-sustained VT >150 bpm.

Related Experiment Videos

  • All patients received optimal acute and long-term medical therapy, including metoprolol CR/ZOK.

    • Main Results:

    • The study compares ICD therapy versus no ICD therapy in selected high-risk patients early post-MI.
    • Focus is placed on the impact of ICDs on overall mortality reduction.

    Conclusions:

    • The IRIS trial aims to determine if ICD therapy significantly reduces total mortality in high-risk patients identified early after acute MI.
    • Results will inform clinical practice regarding early ICD implantation for primary prevention of SCD.