Shocking test may be unnecessary for heart device implants

NCT ID NCT03495297

First seen Jun 10, 2026 · Last updated Jun 15, 2026 · Updated 1 time

Summary

This study tested whether implanting a heart defibrillator under the skin (S-ICD) without doing a defibrillation test is as safe and effective as doing the test. Nearly 1,000 adults at risk of dangerous heart rhythms took part. The goal was to see if skipping the test still allows the device to stop life-threatening arrhythmias on the first try.

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Contacts and locations

Locations

  • Academic Medical Center Amsterdam

    Amsterdam, Netherlands

  • Adventh Health System

    Orlando, Florida, 32803, United States

  • Albert Schweitzer Ziekenhuis

    Dordrecht, Netherlands

  • Asklepios Kliniken

    Hamburg, Germany

  • Barts Health NHS Trust of the Royal London Hospital

    London, EC1A 7BE, United Kingdom

  • Basildon and Thurrock Univerity Hospital NHS Foundation Trust

    Basildon, United Kingdom

  • Blackpool Victoria Hospital NHS Foundation Trust

    Blackpool, United Kingdom

  • Canisius Wilhelmina Ziekenhuis

    Nijmegen, Netherlands

  • Catharina Ziekenhuis

    Eindhoven, Netherlands

  • CorVita Science Foundation

    Chicago, Illinois, 60605, United States

  • Emory University Hospital

    Atlanta, Georgia, 30322, United States

  • Englewood Hospital and Medical Center

    Englewood, New Jersey, 07631, United States

  • Erlanger Health System

    Chattanooga, Tennessee, 37403, United States

  • Flevoziekenhuis

    Almere Stad, Netherlands

  • Heart and Chest Hospital NHS Foundation Trust

    Liverpool, United Kingdom

  • Icahn School of Medicine at Mount Sinaï

    New York, New York, 10029, United States

  • Isala Klinieken

    Zwolle, Netherlands

  • Manchester Heart Center, Manchester Royal Infirmary

    Manchester, M13 9WL, United Kingdom

  • Medisch Centrum Leeuwarden

    Leeuwarden, Netherlands

  • Mount Sinai Beth Israel

    New York, New York, 10003, United States

  • OLVG

    Amsterdam, Netherlands

  • Oxford University Hospitals NHS Foundation Trust

    Oxford, OX3 7LE, United Kingdom

  • Royal Papworth Hospital NHS Foundation Trust

    Cambridge, United Kingdom

  • Sheffield Teaching Hospitals NHS Foundation Trust, Northern General Hospital

    Sheffield, United Kingdom

  • Spaarne Gasthuis

    Haarlem, Netherlands

  • St Antonius Ziekenhuis

    Nieuwegein, Netherlands

  • The Royal Wolverhampton NHS Trust, the New Cross Hospital

    Wolverhampton, United Kingdom

  • UMCG

    Groningen, Netherlands

  • Universitätsklinikum Mannheim

    Mannheim, Germany

  • Universitätsklinikum Schleswig-Holstein

    Kiel, Germany

  • Universitätsklinikum Schleswig-Holstein, Campus Lübeck

    Lübeck, Germany

  • Universitätsklinikum Würzburg

    Würzburg, Germany

Conditions

Explore the condition pages connected to this study.