Clinical trial Recruiting at 1 site Phase 3 Interventional Ages 55 and up

Comparing catheter ablation and non-invasive radio ablation for ventricular tachycardia

Official title: Catheter Ablation Versus Radio-Ablation for Ventricular Tachycardia: a Randomized Controlled Trial

Run by Ottawa Heart Institute Research Corporation · NCT05047198 · Data updated 2026-11-12

This study is testing a new non-invasive treatment for ventricular tachycardia to see if it works better and is safer than the standard catheter ablation for older patients who have had repeated issues.

More Ventricular Tachycardia trials

Quick facts

PhasePhase 3
Study typeInterventional
Ages55 Years and up
SexAll
Enrollment244 (estimated)
SponsorOttawa Heart Institute Research Corporation
Academic / other
Drugs / interventionsRadiation
Locations1 site (Ottawa, Ontario)
StatusRecruiting
StartedDecember 6, 2022
Main results expectedDecember 31, 2026
Study endsDecember 15, 2027
Registry record updatedSeptember 30, 2026
Trial IDNCT05047198 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates are patients aged 55 and older with cardiomyopathy and recurrent ventricular tachycardia events despite previous catheter ablation.

Probably not a fit

Patients with advanced heart failure, those not expected to live for more than one year, or those who have previously received thoracic radiotherapy may not benefit from this study.

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

What this trial studies

This study compares two treatment methods for ventricular tachycardia: the standard catheter ablation and a novel non-invasive radio ablation technique using ECG-based body surface mapping. The goal is to determine the effectiveness of non-invasive radio ablation in targeting and treating ventricular tachycardia circuits without the complications associated with invasive procedures. Patients aged 55 and older with recurrent VT despite previous treatments will be enrolled. The study aims to provide a safer alternative for patients at high risk of complications from traditional catheter ablation.

Why it matters

Potential benefit: If successful, this study could offer a less invasive and safer treatment option for patients suffering from recurrent ventricular tachycardia.

How similar studies have gone: While catheter ablation is the current gold standard, the non-invasive radio ablation approach is novel and has not been extensively tested in similar studies.

Who can join: the full rules

Show full inclusion / exclusion criteria
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.

Where it's running

  • University of Ottawa Heart Institute
    Ottawa, Ontario, Canada
    Recruiting

Study contacts

  • Principal investigator: Calum Redpath — Ottawa Heart Institute Research Corporation
  • Study coordinator: Calum Redpath
  • Email: credpath@ottawaheart.ca
  • Phone: 6136967000

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.