胸部放射治疗后心房动的预测因素
Santino Butler1, Hyunsoo No1, Felicia Guo1
1Department of Radiation Oncology, Stanford University School of Medicine, Palo Alto, California, USA.
JACC. CardioOncology
|January 13, 2025
概括
胸部放射治疗剂量到肺静脉 (PVs) 显著预测心房动 (AF) 的风险. 较高的PV最大剂量 (dmax) 增加了AF发病率,无论患者的风险因素如何,强调心脏基结构在辐射毒性中的重要性.
科学领域:
- 心脏病学 心脏病学
- 辐射瘤学 辐射瘤学
- 医学物理 医学物理
背景情况:
- 心房动 (AF) 是胸部放射治疗的已知并发症.
- 辐射后导致AF风险的特定心脏基层结构尚未确定.
研究的目的:
- 调查特定心脏基结构的辐射与发展临床显著 (等级≥3) AF的风险之间的关联.
- 为了确定预测AF发生率的心脏亚结构的剂量指标.
主要方法:
- 分析了539名为局部癌症 (肺癌,乳腺癌,淋巴瘤,食道癌) 接受终极放射治疗的患者的数据.
- 对心脏基结构的2-Gy分数等效剂量计算:肺静脉 (PVs),左心房,鼻腔节点和冠状动脉.
- 使用与Mayo AF风险评分 (MAFRS) 调整的竞争风险模型来评估AF发病率.
主要成果:
- 增加的AF风险与较高的PV最大剂量 (dmax) (sHR:1.22),较大的左心房体积 (sHR:1.01),吸烟史 (sHR:1.01) 和较高的MAFRS (sHR:1.16) 相关.
- 在不同MAFRS亚组中,PV dmax是AF的显著预测指标.
- 一个PVdmax>39.7 Gy与较高的AF风险有关,独立于MAFRS.
结论:
- 肺静脉最大剂量 (PV dmax) 是 ≥3 AF等级的显著预测因素,而不考虑其他风险因素.
- 这些发现强调了心脏基结构在辐射诱导毒性的关键作用.
- 建议在临床环境中进一步验证PV剂量指标,以减轻AF风险.
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