MAGNETIC VT study: a prospective, multicenter, post-market randomized controlled trial comparing VT ablation outcomes...

Area of Science:

• Cardiology
• Electrophysiology
• Medical Devices

Background:

• Patients with ischemic cardiomyopathy (ICM) frequently experience scar-related ventricular tachycardia (VT).
• Accurate localization of the arrhythmogenic substrate and stable electrode-tissue contact are crucial for successful VT ablation.
• Current ablation techniques involve manual or remote magnetic navigation (RMN) to identify reentry circuits and target critical isthmuses.

Purpose of the Study:

• To evaluate if VT ablation using the Niobe™ ES magnetic navigation system provides superior outcomes compared to manual ablation in patients with ischemic scar VT and low ejection fraction.
• To assess the clinical advantages of substrate-based VT ablation with RMN versus manual catheter manipulation.

Main Methods:

• A randomized, single-blind, prospective, multicenter post-market study (NCT02637947).
• 386 patients with ICM, left ventricular ejection fraction (LVEF) ≤35%, and sustained monomorphic VT will be randomized 1:1 to Niobe ES system or manual ablation.
• Primary endpoint: freedom from VT recurrence at 12 months. Secondary endpoints include acute success, VT freedom in large-scar patients, adverse events, and mortality.

Main Results:

• This section is not yet available as the study is ongoing.
• The study aims to enroll 386 subjects, with 193 in each treatment arm.
• Follow-up includes ICD interrogation at 3, 6, 9, and 12 months.

Conclusions:

• The MAGNETIC VT trial is designed to determine the efficacy of RMN-guided VT ablation.
• Findings will clarify if RMN offers clinical benefits over manual catheter manipulation for treating VT in ICM patients.