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Comparison of Focal Cryoablation vs. Radiofrequency Cardioneuroablation for Bradyarrhythmias
Sponsor: Tomsk National Research Medical Center of the Russian Academy of Sciences
Summary
Bradyarrhythmias are conditions where the heart beats too slowly, causing symptoms like dizziness, fainting, and fatigue. In some patients, these slow heart rhythms are caused by overactivity of the vagus nerve (the part of the nervous system that slows the heart down). Cardioneuroablation (CNA) is a catheter-based procedure that targets and reduces the effect of these overactive nerves on the heart. It is an alternative to permanent pacemaker implantation, especially for younger patients. Traditionally, CNA is performed using radiofrequency (RF) energy to create small burns in specific areas of the heart. This study investigates whether focal cryoablation (freezing technology using the Freezor™ Xtra catheter) is as safe and effective as standard RF ablation for CNA. This is a prospective, non-randomized study. Participants will receive either RF ablation (N=30) or cryoablation (N=30). The study will evaluate the recurrence of slow heart rhythms and fainting episodes, as well as any complications, over 12 months of follow-up.
Official title: Prospective Non-Randomized Comparison of Point-by-Point Cryoablation Using Freezor™ Xtra Versus Radiofrequency Ablation Using TactiFlex™ SE of Parasympathetic Ganglia (Cardioneuroablation) in Patients With Vagally-Mediated Bradyarrhythmias
Key Details
Gender
All
Age Range
18 Years - 60 Years
Study Type
INTERVENTIONAL
Enrollment
60
Start Date
2024-09-01
Completion Date
2028-12-25
Last Updated
2026-06-26
Healthy Volunteers
No
Interventions
Focal Cryoablation
Focal cryoablation of right atrial ganglionated plexi using Freezor™ Xtra 6mm catheter (Medtronic) at -75°C for 240 seconds per application. 3-5 applications per GP zone. Positioned by fluoroscopy and impedance-based tracking in EnSite™ X system.
Radiofrequency Catheter Ablation
Radiofrequency ablation of right atrial ganglionated plexi using TactiFlex™ SE catheter (Abbott) with power up to 45W, temperature 50°C, target AI 45, with irrigation. 3-5 applications per GP zone. Guided by EnSite™ X mapping system and spectral analysis (OTNF).
Locations (1)
Cardiology Research Institute, Tomsk National Research Medical Center of the Russian Academy of Sciences
Tomsk, Tomsk Oblast, Russia