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Zapping the heart: radiation therapy for stubborn arrhythmias

NCT ID NCT05439031

Disease control Sponsor: Academisch Medisch Centrum - Universiteit van Amsterdam (AMC-UvA) Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now This study
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 25, 2026 · Last updated Jun 27, 2026 · Updated 2 times

Summary

This study tests a single, high-dose radiation treatment aimed at the area of the heart causing dangerous rapid rhythms (ventricular tachycardia). It includes 12 adults with an implanted defibrillator who have not been helped by medications or standard procedures. The goal is to see if this approach can reduce episodes by at least half over a year while keeping side effects low.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
radiation therapy (stereotactic arrhythmia radiotherapy)
What this could lead to
If successful, this could offer a new, non-invasive treatment option for patients with difficult-to-control ventricular tachycardia.
What could go wrong
This is a small, early-phase study with only 12 participants, so results may not apply broadly. Radiation also carries risks of damage to nearby healthy tissue.

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

Phase 2

Tests whether the treatment actually works, and watches for side effects, in a larger group.

Participants

About 12 people

The number the study aims to enrol. It can still change while the study runs.

Started

May 2023

Expected to finish

Jul 2027

An estimate. End dates often move.

Lead sponsor

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

18 years and older

Sex

Anyone

Healthy volunteers

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

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Age ≥18 years * Implanted ICD * World Health Organization (WHO) / Eastern Cooperative Oncology Group (ECOG) performance status grade 0-3 in the past 3 months (from fully active to capable of limited self-care, see below for full explanation) * At least 3 episodes of treated VT within the last 3 months * Recurrence of VT after * Failed or intolerant to least one class 1 or class 3 anti-arrhythmic drug AND * At least one catheter ablation procedure OR considered to be unsuitable for a catheter ablation procedure (e.g. no sufficient vascular access, considered unfit to undergo prolonged general anesthesia, comorbid conditions resulting in unacceptable peri-procedural risks) * Able and willing to undergo all necessary evaluations, treatment and follow-up for the study and of follow-up thereafter Exclusion Criteria: * Pregnancy * History of radiation treatment in the thorax or upper abdominal region * Interstitial pulmonary disease

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Conditions

The condition(s) this trial relates to.

Arrhythmias, Cardiac cardiac rhythm disease ventricular tachycardia

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Arrythmia, cardiac Ventricular tachycardia

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The places running it

    1 site. The list below names each one and where it is.

  2. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  3. 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

  • Amsterdam UMC location University of Amsterdam

    RECRUITING

    Amsterdam, North Holland, 1105AZ, Netherlands

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