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.
Quick facts
| Phase | Phase 3 |
|---|---|
| Study type | Interventional |
| Ages | 55 Years and up |
| Sex | All |
| Enrollment | 244 (estimated) |
| Sponsor | Ottawa Heart Institute Research Corporation Academic / other |
| Drugs / interventions | Radiation |
| Locations | 1 site (Ottawa, Ontario) |
| Status | Recruiting |
| Started | December 6, 2022 |
| Main results expected | December 31, 2026 |
| Study ends | December 15, 2027 |
| Registry record updated | September 30, 2026 |
| Trial ID | NCT05047198 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.
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DuoVT PFA System for Treating Ventricular Tachycardia
This study tests whether the DuoVT Pulsed Field Ablation system can safely and effectively treat Ventricular Tachycardia in people with ischemic heart disease.
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Sphere VT: Using Sphere-9 Catheter and Affera System to treat recurrent scar-related ventricular tachycardia
This study tests the Sphere-9 catheter and Affera mapping and ablation system in adults with recurring scar-related ventricular tachycardia after a prior heart attack.
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Parasternal EV-ICD System Pivotal Study
This study tests the Parasternal Extravascular ICD System in adults who need an ICD to see if it can safely provide defibrillation without traditional leads.
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Real-time intracardiac ultrasound to guide ablation of ventricular arrhythmias
It tests whether using ultrasound inside the heart during PVC or VT ablation can reduce X-ray exposure for adults having these procedures.
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Arrhythmia mapping with a paddle-shaped multi-electrode catheter
This test uses a new high-density multi-electrode catheter to see if it can safely map atrial and ventricular arrhythmias in adults having catheter mapping and ablation.
How to take part
- Review the eligibility criteria above with your treating physician.
- Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
- Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.