Clinical trial Recruiting at 25 sites Phase 3 Interventional Ages 18 and up

Preventive amiodarone after out-of-hospital cardiac arrest with an initial shockable rhythm

Official title: Prophylactic Anti-aRrhythmic Therapy With Amiodarone in Critically Ill Patients Admitted for an Out-of-hospital Cardiac Arrest With Initial Shockable Rhythm.

Run by Versailles Hospital · NCT06835491 · Data updated 2026-11-12

This will try whether giving amiodarone for 72 hours to adults admitted to intensive care after an out-of-hospital cardiac arrest with a shockable rhythm reduces death or severe ventricular arrhythmia within 30 days.

More Ventricular Arrhythmias and Cardiac Arrest trials

Quick facts

PhasePhase 3
Study typeInterventional
Ages18 Years and up
SexAll
Enrollment674 (estimated)
SponsorVersailles Hospital
Academic / other
Locations29 sites (Amiens and 28 other locations)
StatusRecruiting
StartedNovember 6, 2025
Main results expectedJanuary 15, 2027
Study endsMarch 15, 2027
Registry record updatedDecember 23, 2025
Trial IDNCT06835491 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Adults (≥18 years) admitted to ICU after an out-of-hospital cardiac arrest with an initial shockable rhythm, presumed or unknown cardiac cause, able to be screened within 6 hours of ROSC and with central venous access are ideal candidates.

Probably not a fit

Patients with a clear non-cardiac cause of arrest, those already requiring VA-ECMO, those with contraindications to amiodarone, or with preexisting indications for amiodarone are unlikely to benefit from the prophylactic approach.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This Phase 3 interventional trial tests prophylactic intravenous amiodarone infusion for 72 hours in critically ill adults admitted to the ICU after an out-of-hospital cardiac arrest with an initial shockable rhythm and a presumed or unknown cardiac cause. The main outcome is a composite of 30-day all-cause mortality and/or severe in-hospital recurrence of ventricular fibrillation or ventricular tachycardia requiring intervention. Eligible patients must be screened and randomized within 6 hours of return of spontaneous circulation and have central venous access for continuous infusion. Key exclusions include extra-cardiac cause of arrest, existing indications or contraindications to amiodarone, need for VA-ECMO at admission, thyroid disease under treatment, and untreated conduction disorders.

Why it matters

Potential benefit: If successful, the approach could reduce early deaths and serious ventricular arrhythmia recurrences after out-of-hospital cardiac arrest.

How similar studies have gone: Amiodarone is established for treating ventricular arrhythmias during resuscitation, but prophylactic post-resuscitation use to prevent recurrence has limited large randomized Phase 3 evidence.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

1. Patient aged ≥ 18 years
2. Admitted in intensive care unit
3. Out-of-hospital cardiac arrest with initial shockable rhythm
4. Presumed cardiac or unknown cause
5. Delay between ROSC and screening for randomisation \< 6 hours
6. Informed consent from the patient or a surrogate or deferred consent
7. Affiliated to or benefiting from a social insurance

Exclusion Criteria:

1. Cardiac arrest secondary to an extra-cardiac cause (suspected or confirmed)
2. Indication for amiodarone decided by the physician at ICU admission
3. No central venous catheter available for continuous infusion of amidoarone
4. Thyroid disease under treatment
5. History of cardiac conduction disorders, not treated by permanent pacemaker
6. Any contra indication to amiodarone treatment
7. Refractory ventricular arrhythmia or electrical storm
8. Need for veno-arterial extracorporeal membrane oxygenation (VA-ECMO) at admission
9. Known limitations in therapy and Do Not Resuscitate-order
10. Moribund patient due to pre-arrest history (estimated life expectancy \< 3 months)
11. Pregnant or breastfeeding women
12. Patient needing a nadolol treatment due to QT long syndrome or catecholaminergic polymorphic ventricular tachycardia
13. Patient with known pulmonary fibrosis
14. Patient with known interstitial lung disease

Where it's running

  • Chu Angers
    Angers, France
    Recruiting
  • CH annecy genevois
    Annecy, France
    Recruiting
  • Ch Argenteuil
    Argenteuil, France
    Recruiting
  • CH Mondor
    Aurillac, France
    Recruiting
  • CHU Brest
    Brest, France
    Recruiting
  • CH Brive
    Brive-la-Gaillarde, France
    Recruiting
Show 23 more locations
  • Chi Nord Ardennes
    Charleville-Mézières, France
    Recruiting
  • Chsf
    Corbeil-Essonnes, France
    Recruiting
  • CHD vendée
    La Roche-sur-Yon, France
    Recruiting
  • CH la rochelle
    La Rochelle, France
    Recruiting
  • Hcl
    Lyon, France
    Recruiting
  • Ap Hm
    Marseille, France
    Recruiting
  • Hopital Cartier
    Massy, France
    Recruiting
  • Hoptial Mulhouse
    Mulhouse, France
    Recruiting
  • Clinique Ambroise Paré
    Neuilly-sur-Seine, France
    Recruiting
  • CHU Nice -MIR Archet
    Nice, France
    Recruiting
  • CHU Nice -MIR Pasteur
    Nice, France
    Recruiting
  • Chu Orléans
    Orléans, France
    Recruiting
  • CHU Cochin
    Paris, France
    Recruiting
  • Hopital saint joseph
    Paris, France
    Recruiting
  • CHU Poitiers
    Poitiers, France
    Recruiting
  • Chu Strasbourg
    Strasbourg, France
    Recruiting
  • CHI Toulon
    Toulon, France
    Recruiting
  • Chu Toulouse
    Toulouse, France
    Recruiting
  • CH Cotentin
    Valognes, France
    Recruiting
  • Chu Amiens
    Amiens, France
    Not yet recruiting
  • Chu Caen
    Caen, France
    Not yet recruiting
  • chi Gregoire
    Montreuil, France
    Not yet recruiting
  • CHU Nantes
    Nantes, France
    Not yet recruiting

Study contacts

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.