Electroanatomical mapping after cardiac radioablation for treatment of incessant electrical storm: a case report from the RAVENTA trial

Background Electroanatomical mapping (EAM)-guided stereotactic arrhythmia radioablation (STAR) is a novel noninvasive therapy option for patients with monomorphic ventricular tachycardia (VT) refractory to antiarrhythmic drugs and/or urgent catheter ablation (CA). Data on success rates in an emergen...

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Hauptverfasser: Kästner, Lena (VerfasserIn) , Boda-Heggemann, Judit (VerfasserIn) , Fanslau, Hannah (VerfasserIn) , Xie, Jingyang (VerfasserIn) , Schweikard, Achim (VerfasserIn) , Giordano, Frank Anton (VerfasserIn) , Blanck, Oliver (VerfasserIn) , Rudic, Boris (VerfasserIn)
Dokumenttyp: Article (Journal)
Sprache:Englisch
Veröffentlicht: 12 September 2023
In: Strahlentherapie und Onkologie
Year: 2023, Jahrgang: 199, Heft: 11, Pages: 1018-1024
ISSN:1439-099X
DOI:10.1007/s00066-023-02136-z
Online-Zugang:Verlag, kostenfrei, Volltext: https://doi.org/10.1007/s00066-023-02136-z
Verlag, kostenfrei, Volltext: https://link.springer.com/10.1007/s00066-023-02136-z
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Verfasserangaben:Lena Kaestner, Judit Boda-Heggemann, Hannah Fanslau, Jingyang Xie, Achim Schweikard, Frank A. Giordano, Oliver Blanck, Boris Rudic

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520 |a Background Electroanatomical mapping (EAM)-guided stereotactic arrhythmia radioablation (STAR) is a novel noninvasive therapy option for patients with monomorphic ventricular tachycardia (VT) refractory to antiarrhythmic drugs and/or urgent catheter ablation (CA). Data on success rates in an emergency situation such as electrical storm (ES) are rare. We present a case of a patient with an initially very poor life expectancy after extensive myocardial infarction with therapy-resistant ES, not amendable for further antiarrhythmic drug therapy, implantable cardioverter-defibrillator implantation, or repeated CA who was introduced to the radiation oncology department for emergency STAR as a bail-out therapy. - Methods Target volume definition and transfer from EAM to CT were validated and quality assured with a semi-automatic, dedicated visualization tool (CARDIO-RT). Emergency STAR was performed with 25 Gy in the framework of the RAVENTA study. The VT burden gradually decreased after STAR; however, a second VT morphology occurred, which was successfully treated with EAM-guided CA 12 days after STAR. - Results The second EAM-guided CA showed areas of low voltage in the irradiated segments, indicating a precise targeting and early functional response to STAR. The patient remained free of any VT recurrence or any radiation-related toxicities and in good general condition during the recent follow-up of 18 months. - Conclusion The case highlights the possible approach, caveats, difficulties, and prognosis of a patient severely affected by therapy-resistant VT in whom CA could not lead to VT suppression. Further studies of putative mechanisms of STAR in the acute and chronic phase of this novel therapy are warranted. 
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