ESTRO 2022 - Abstract Book

S628

Abstract book

ESTRO 2022

Conclusion This abstract represents preliminary findings for a large retrospective cohort study. This study supports a direction away from mean organ at risk analysis and toward distributional dose quantification. Additional organs at risk should be segmented and accounted for. Furthermore, quantification of dose to substructures of the heart may provide further insights. While this is a large study compared to the existing literature on this topic, there is an opportunity to expand the timeframe as well as location, which may improve generalizability and power of the study.

MO-0717 Radiation Therapy and Cardiovascular Implanted Electronic Devices: a single center years expierence

S. Baroni 1 , S. Gulletta 2 , M. Pasetti 3 , P. Vergara 4 , S. Broggi 5 , R. Tummineri 3 , C.L. Deantoni 3 , F. Zerbetto 3 , A. Fodor 3 , G. Mandurino 1 , A. Sanchez Galvan 3 , N. Fierro 6 , I. Dell'Oca 3 , S. Arcangeli 7 , N.G. Di Muzio 8 1 San Raffaele Scientific Institute, Milano-Bicocca University, Radiation Oncology, Milan, Italy; 2 San Raffaele Scientific Institute, Arrhitmology, MIlan, Italy; 3 San Raffaele Scientific Institute, Radiation Oncology, Milan, Italy; 4 San Raffaele Scientific Institute, Arrhitmology, Milan, Italy; 5 San Raffaele Scientific Institute, Medical Physics, milan, Italy; 6 San Raffaele Scientific Institute, Vita-Salute San Raffaele University, Arrhitmology, Milan, Italy; 7 Milano-Bicocca University, ASST Monza, Radiation Oncology, Monza, Italy; 8 Vita-Salute San Raffaele University, San Raffaele Scientific Institute , Radiation Oncology, Milan, Italy Purpose or Objective Cardiovascular Implanted Electronic Devices (CIED) are becoming more frequently implanted in oncologic patients (pts). Arrithmologist and Radiation Oncologist need to cooperate for the management of these pts. In vitro and in vivo studies demonstrated several malfunctions of CIED following direct exposure to high-energy photons beam. During the treatment planning process CIEDs must be considered as Organ at Risk with specific constraint. In 2018 AIRO (Italian Association of Radiation Oncology) and AIAC(Italian Association of Arrithmology and Cardiac Stimulation) proposed guidelines for CIED management during radiotherapy work flow. Based on CIED dependency, dose at CIED, treatment site and photon beam energy pts are classified in 3 risk groups (low, moderate and high). Materials and Methods Since 2010, every pt with CIED was evaluated by a dedicated Arrithmologist before Radiation Therapy. During the treatment session every pt was followed by ECG/pulse-oximeter + audio-visual monitoring and magnet positioning. After the daily session, every pt was revaluated by the same Arrithmologist. The contouring of CIED and Lead was integrated into RT plan in order to avoid Maximum Dose > 2 Gy apart from some specific situation. Photon beam energy was 6 MeV for all treatments.