ICD or not? landmark trial tests defibrillator necessity in seniors with heart failure.
NCT ID NCT05373940
First seen Jun 25, 2026 · Last updated Jun 27, 2026 · Updated 1 time
Summary
This study is testing whether people aged 70 and older with heart failure and a weak heart pump live just as long with only medication as they do with an implanted defibrillator (ICD). The trial will randomly assign 730 participants to receive either an ICD plus medication or medication alone, and track survival over four years. The goal is to see if skipping the ICD is safe and avoids unnecessary procedures in this age group.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- Active substance
- Implantable cardioverter defibrillator (ICD)
- What this could lead to
- If successful, this could show that older heart failure patients can safely skip an ICD and rely on medication alone, avoiding surgery and device risks.
- What could go wrong
- The trial is still recruiting and results are years away. It may find that skipping the ICD leads to more sudden cardiac deaths, or that the benefit of the ICD is too small to outweigh its risks.
This is an AI summary of the original study and may miss details. Read our disclaimer.
Study facts
What this study's own registry entry says, in plain language.
- Phase
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Not a phased trial
Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.
- Participants
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About 730 people
The number the study aims to enrol. It can still change while the study runs.
- Started
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Jun 2022
- Expected to finish
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May 2030
An estimate. End dates often move.
- Lead sponsor
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Other sponsor
The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
- Ages
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70 years and older
- Sex
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Anyone
- Healthy volunteers
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Not accepted
This study is not open to healthy volunteers. The entry requirements below say who it is open to.
Show the full entry requirements Hide the full entry requirements
Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: * ≥70 years old, * Left ventricular ejection fraction ≤ 35%, assessed by echocardiography, single-photon emission computed tomography and radionuclide ventriculography and/or cardiac magnetic resonance (CMR) (assessed at inclusion or within the 6 weeks prior to inclusion). * NYHA class II or III * Heart failure HFOT ≥ 3 months (Possible exceptions : possibility of including patients who do not tolerate the maximum dose or who do not tolerate all four therapeutic classes, as well as the possibility of not waiting for three months when one of the classes is discontinued or when dosage adjustments are made due to poor tolerance ...) * Providing informed consent * Affiliated to a French Health Insurance system. Exclusion Criteria: * Enrolled in or planning to enroll in a conflicting interventional trial (trial evaluating the interest of ICD or modifying HFOT outside the last ESC Guidelines) * Prior unstable sustained ventricular arrhythmia requiring external cardioversion * Myocardial infarction within the 40 days * Coronary artery intervention (catheter or surgical) within 90 days * History of syncope in the previous 6 months * Advanced cerebrovascular disease (cerebrovascular disease with functional repercussions or effect on the patient's autonomy) * Cognitive impairment leading to the incapacity of consent * Any disease other than cardiac disease (e.g. cancer, uremia, liver failure), associated with a likelihood of survival less than 1 year. * Patient under tutorship, curatorship, or legal safeguard * Persons deprived of their liberty by judicial or administrative decision (prisoner)
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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.
How to take part
Only the study team decides who joins. These are the ways to reach them.
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The places running it
19 sites. The list below names each one and where it is.
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The official record
ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.
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A doctor treating you
A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.
Contacts and locations
Locations
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CHU Amiens-Picardie-Site sud
RECRUITINGAmiens, 80054, France
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CHU Brest - Hôpital La Cavale Blanche
RECRUITINGBrest, 29200, France
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CHU Grenoble Alpes
RECRUITINGLa Tronche, 38700, France
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CHU Poitiers
RECRUITINGPoitiers, 86021, France
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CHU Strasbourg
RECRUITINGStrasbourg, 67200, France
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CHU de Nantes
RECRUITINGNantes, 44093, France
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CHU de Rouen
RECRUITINGRouen, 76000, France
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Centre Cardiologique du Nord
RECRUITINGSaint-Denis, 93207, France
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Centre Hospitalier d'Aix en provence
RECRUITINGAix-en-Provence, 13616, France
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Clinique Pasteur
RECRUITINGToulouse, 31076, France
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Groupement d'Hôpitaux de l'Institut Catholique de Lille
RECRUITINGLomme, 59462, France
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Hôpital Bichat - Claude Bernard
RECRUITINGParis, 75014, France
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Hôpital Pitié-Salpétrière
RECRUITINGParis, 75013, France
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Hôpital Pontchaillou
RECRUITINGRennes, 35033, France
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Hôpital Trousseau
RECRUITINGTours, 37170, France
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Hôpital de Brabois
RECRUITINGNancy, 54710, France
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Hôpital de La Timone
RECRUITINGMarseille, 13385, France
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Hôpital européen Georges Pompidou
RECRUITINGParis, , 75015, France
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HôpitalHenri Mondor
RECRUITINGCréteil, 94000, France
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