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Zapping heart trouble without surgery: new trial tests Non-Invasive radiation

NCT ID NCT05047198

Disease control Sponsor: Ottawa Heart Institute Research Corporation 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 27, 2026 · Last updated Jun 27, 2026

Summary

This study tests a new, non-invasive radiation treatment against the standard catheter procedure for ventricular tachycardia, a dangerous fast heartbeat. About 244 adults with heart failure and an implanted defibrillator will be randomly assigned to one of the two treatments. The goal is to see which approach better prevents death, shocks from the defibrillator, and further heart rhythm problems.

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 3

Large-scale testing in a bigger group. Usually the last step before a treatment can be approved.

Participants

About 244 people

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

Started

Dec 2022

Expected to finish

Dec 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

55 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: 1. Patient aged ≥55 years of age 2. Cardiomyopathy (Left ventricular ejection fraction ≤ 35% and ICD in situ) AND 3. Recurrent VT events despite previous CA OR 4. VT events requiring intervention and PAINESD score ≥ 15 Exclusion Criteria: 1. Patients with NYHA Class IV heart failure \&/ or with LVAD in situ 2. Patients not expected to live for more than one year for any reason 3. Patients who have previously received thoracic radiotherapy 4. Patients who are enrolled in another randomized clinical trial 5. Patients who are unable or unwilling to provide informed consent 6. Patients aged ≤54 years of age 7. Pregnancy (all women of child bearing age and potential will have a negative β-HCG test before enrollment) 8. Breastfeeding 9. Women of childbearing age who refuse to use a highly effective and medically acceptable form of contraception (IUD, sterilization, birth control implant or birth control pill) throughout the study.

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Conditions

The condition(s) this trial relates to.

ventricular tachycardia

As listed by the trial registrant

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

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

  • University of Ottawa Heart Institute

    RECRUITING

    Ottawa, Ontario, K1Y 4W7, Canada

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