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Stereotactic Arrhythmia Radioablation (STAR): Assessment of cardiac and respiratory heart motion in ventricular tachycardia patients- A STOPSTORM.eu consortium review

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RADIOTHERAPY AND ONCOLOGY
卷 188, 期 -, 页码 -

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ELSEVIER IRELAND LTD
DOI: 10.1016/j.radonc.2023.109844

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Stereotactic Arrhythmia Radioablation; Cardiac SBRT; Cardiac radioablation; Ventricular tachycardia

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This review examined the cardiorespiratory motion data in Stereotactic Arrhythmia Radioablation (STAR) and found limited detailed data on the subject. There were inconsistencies in reported parameters, making data comparison difficult. Due to the high patient-specific nature of cardiorespiratory motion, individual motion management strategies are highly recommended during imaging, planning, and treatment for STAR.
Aim: To identify the optimal STereotactic Arrhythmia Radioablation (STAR) strategy for individual patients, cardiorespiratory motion of the target volume in combination with different treatment methodologies needs to be evaluated. However, an authoritative overview of the amount of cardiorespiratory motion in ventricular tachycardia (VT) patients is missing. Methods: In this STOPSTORM consortium study, we performed a literature review to gain insight into cardiorespiratory motion of target volumes for STAR. Motion data and target volumes were extracted and summarized. Results: Out of the 232 studies screened, 56 provided data on cardiorespiratory motion, of which 8 provided motion amplitudes in VT patients (n = 94) and 10 described (cardiac/cardiorespiratory) internal target volumes (ITVs) obtained in VT patients (n = 59). Average cardiac motion of target volumes was < 5 mm in all directions, with maximum values of 8.0, 5.2 and 6.5 mm in Superior-Inferior (SI), Left-Right (LR), Anterior-Posterior (AP) direction, respectively. Cardiorespiratory motion of cardiac (sub)structures showed average motion between 5-8 mm in the SI direction, whereas, LR and AP motions were comparable to the cardiac motion of the target volumes. Cardiorespiratory ITVs were on average 120-284% of the gross target volume. Healthy subjects showed average cardiorespiratory motion of 10-17 mm in SI and 2.4-7 mm in the AP direction. Conclusion: This review suggests that despite growing numbers of patients being treated, detailed data on cardiorespiratory motion for STAR is still limited. Moreover, data comparison between studies is difficult due to inconsistency in parameters reported. Cardiorespiratory motion is highly patient-specific even under motion-compensation techniques. Therefore, individual motion management strategies during imaging, planning, and treatment for STAR are highly recommended. (C) 2023 The Authors. Published by Elsevier B.V. Radiotherapy and Oncology xxx (2023) xxx-xxx This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).

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