Radiosurgery for ventricular tachycardia: preclinical and clinical evidence and study design for a German multi-center multi-platform feasibility trial (RAVENTA)

Oliver Blanck*, Daniel Buergy, Maren Vens, Lina Eidinger, Adrian Zaman, David Krug, Boris Rudic, Judit Boda-Heggemann, Frank A. Giordano, Leif Hendrik Boldt, Felix Mehrhof, Volker Budach, Achim Schweikard, Denise Olbrich, Inke R. König, Frank Andre Siebert, Reinhard Vonthein, Jürgen Dunst, Hendrik Bonnemeier

*Korrespondierende/r Autor/-in für diese Arbeit


BACKGROUND: Single-session high-dose stereotactic radiotherapy (radiosurgery) is a new treatment option for otherwise untreatable patients suffering from refractory ventricular tachycardia (VT). In the initial single-center case studies and feasibility trials, cardiac radiosurgery has led to significant reductions of VT burden with limited toxicities. However, the full safety profile remains largely unknown.

METHODS/DESIGN: In this multi-center, multi-platform clinical feasibility trial which we plan is to assess the initial safety profile of radiosurgery for ventricular tachycardia (RAVENTA). High-precision image-guided single-session radiosurgery with 25 Gy will be delivered to the VT substrate determined by high-definition endocardial electrophysiological mapping. The primary endpoint is safety in terms of successful dose delivery without severe treatment-related side effects in the first 30 days after radiosurgery. Secondary endpoints are the assessment of VT burden, reduction of implantable cardioverter defibrillator (ICD) interventions [shock, anti-tachycardia pacing (ATP)], mid-term side effects and quality-of-life (QoL) in the first year after radiosurgery. The planned sample size is 20 patients with the goal of demonstrating safety and feasibility of cardiac radiosurgery in ≥ 70% of the patients. Quality assurance is provided by initial contouring and planning benchmark studies, joint multi-center treatment decisions, sequential patient safety evaluations, interim analyses, independent monitoring, and a dedicated data and safety monitoring board.

DISCUSSION: RAVENTA will be the first study to provide the initial robust multi-center multi-platform prospective data on the therapeutic value of cardiac radiosurgery for ventricular tachycardia.

TRIAL REGISTRATION NUMBER: NCT03867747 ( Registered March 8, 2019. The study was initiated on November 18th, 2019, and is currently recruiting patients.

ZeitschriftClinical Research in Cardiology
Seiten (von - bis)1319-1332
PublikationsstatusVeröffentlicht - 01.11.2020


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