Heart device study questions need for shock test during implant
NCT ID NCT03495297
First seen Jun 10, 2026 · Last updated Jun 18, 2026 · Updated 2 times
Summary
This study looked at whether it is safe to skip the defibrillation test when implanting a subcutaneous implantable cardioverter-defibrillator (S-ICD), a device that shocks the heart back to normal rhythm during dangerous arrhythmias. About 965 adults who needed an S-ICD were randomly assigned to receive the implant with or without the test. The main goal was to see if skipping the test led to more failed first shocks when the device was needed. Results help doctors decide if the test is necessary.
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Summaries may miss details or leave out important information. Before applying or accepting participation, make sure you have read and understood the full study. Curemydisease.com takes no responsibility whatsoever for anything missed, misunderstood, or acted upon as a result of our summary — we know it does not capture everything.
This is a summary of the original study . Summaries may miss details or leave out important information. Before applying or accepting participation, make sure you have read and understood the full study. Curemydisease.com takes no responsibility whatsoever for anything missed, misunderstood, or acted upon as a result of our summary — we know it does not capture everything.
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Contacts and locations
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Locations
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Academic Medical Center Amsterdam
Amsterdam, Netherlands
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Adventh Health System
Orlando, Florida, 32803, United States
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Albert Schweitzer Ziekenhuis
Dordrecht, Netherlands
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Asklepios Kliniken
Hamburg, Germany
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Barts Health NHS Trust of the Royal London Hospital
London, EC1A 7BE, United Kingdom
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Basildon and Thurrock Univerity Hospital NHS Foundation Trust
Basildon, United Kingdom
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Blackpool Victoria Hospital NHS Foundation Trust
Blackpool, United Kingdom
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Canisius Wilhelmina Ziekenhuis
Nijmegen, Netherlands
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Catharina Ziekenhuis
Eindhoven, Netherlands
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CorVita Science Foundation
Chicago, Illinois, 60605, United States
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Emory University Hospital
Atlanta, Georgia, 30322, United States
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Englewood Hospital and Medical Center
Englewood, New Jersey, 07631, United States
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Erlanger Health System
Chattanooga, Tennessee, 37403, United States
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Flevoziekenhuis
Almere Stad, Netherlands
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Heart and Chest Hospital NHS Foundation Trust
Liverpool, United Kingdom
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Icahn School of Medicine at Mount Sinaï
New York, New York, 10029, United States
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Isala Klinieken
Zwolle, Netherlands
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Manchester Heart Center, Manchester Royal Infirmary
Manchester, M13 9WL, United Kingdom
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Medisch Centrum Leeuwarden
Leeuwarden, Netherlands
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Mount Sinai Beth Israel
New York, New York, 10003, United States
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OLVG
Amsterdam, Netherlands
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Oxford University Hospitals NHS Foundation Trust
Oxford, OX3 7LE, United Kingdom
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Royal Papworth Hospital NHS Foundation Trust
Cambridge, United Kingdom
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Sheffield Teaching Hospitals NHS Foundation Trust, Northern General Hospital
Sheffield, United Kingdom
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Spaarne Gasthuis
Haarlem, Netherlands
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St Antonius Ziekenhuis
Nieuwegein, Netherlands
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The Royal Wolverhampton NHS Trust, the New Cross Hospital
Wolverhampton, United Kingdom
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UMCG
Groningen, Netherlands
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Universitätsklinikum Mannheim
Mannheim, Germany
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Universitätsklinikum Schleswig-Holstein
Kiel, Germany
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Universitätsklinikum Schleswig-Holstein, Campus Lübeck
Lübeck, Germany
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Universitätsklinikum Würzburg
Würzburg, Germany
Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.