The Importance of Radiation Dose to the Atherosclerotic Plaque in the Left Anterior Descending Coronary Artery for Radiation-Induced Cardiac Toxicity of Breast Cancer Patients?

被引:24
|
作者
van den Bogaard, Veerle A. B. [1 ]
Spoor, Daan S. [1 ]
van der Schaaf, Arjen [1 ]
van Dijk, Lisanne, V [1 ]
Schuit, Ewoud [2 ]
Sijtsema, Nanna M. [1 ]
Langendijk, Johannes A. [1 ]
Maduro, John H. [1 ]
Crijns, Anne P. G. [1 ]
机构
[1] Univ Groningen, Univ Med Ctr Groningen, Dept Radiat Oncol, Groningen, Netherlands
[2] Univ Med Ctr Utrecht, Julius Ctr Hlth Sci & Primary Care, Utrecht, Netherlands
关键词
ISCHEMIC-HEART-DISEASE; RADIOTHERAPY; COMPLICATIONS; DAMAGE; ATLAS;
D O I
10.1016/j.ijrobp.2021.03.004
中图分类号
R73 [肿瘤学];
学科分类号
100214 ;
摘要
Purpose: Radiation-induced acute coronary events (ACEs) may occur as a treatment-related late adverse effect of breast cancer (BC) radiation. However, the underlying mechanisms behind this radiation-induced cardiac disease remain to be determined. The objective of this study was to test the hypothesis that radiation dose to calcified atherosclerotic plaques in the left anterior descending coronary artery (LAD) is a better predictor for ACEs than radiation dose to the whole heart or left ventricle in patients with BC treated with radiation therapy. Methods and Materials: The study cohort consisted of 910 patients with BC treated with postoperative radiation therapy after breast-conserving surgery. In total, 163 patients had an atherosclerotic plaque in the LAD. The endpoint was the occurrence of an ACE after treatment. For each individual patient, the mean heart dose, volume of the left ventricle receiving >= 5 Gy (LV-V5), mean LAD dose, and mean dose to calcified atherosclerotic plaques in the LAD, if present, were acquired based on planning computed tomography scans. Cox regression analysis was used to analyze the effects on the cumulative incidence of ACEs. Results: The median follow-up time was 9.2 years (range, 0.1-14.3 years). In total, 38 patients (4.2%) developed an ACE during follow-up. For patients with an atherosclerotic plaque (n = 163), the mean dose to the atherosclerotic plaque was the strongest predictor for ACEs, even after correction for cardiovascular risk factors (hazard ratio [HR], 1.269; 95% CI, 1.090-1.477; P =.002). The LV-V5 was associated with ACEs in patients without atherosclerotic plaques in the LAD (n = 680) (HR, 1.021; 95% CI, 1.003-1.039; P =.023). Conclusions: The results of this study suggest that radiation dose to pre-existing calcified atherosclerotic plaques in the LAD is strongly associated with the development of ACEs in patients with BC. (C) 2021 The Authors. Published by Elsevier Inc.
引用
收藏
页码:1350 / 1359
页数:10
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