The authors¹ use a large arteriovenous malformation (AVM) radiosurgery series to study the impact of variceal venous drainage on hemorrhage before or after stereotactic radiosurgery. They found that variceal drainage did not correlate with an increased hemorrhage risk. Many investigators have sought to define angioarchitectural risk factors that relate to clinical outcomes. AVM volume, the presence of intranidal or flow-related perinidal aneurysms, AVM location, patient age, and number of draining veins have all been studied.² Venous outflow restriction can contribute to the genesis of an AVM, and it is appropriate to study the role a varix might play in hemorrhage risk. In their series, 12% had prior partial resection and 28% had embolization. To reduce bias, cases were matched with and...

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评论：静脉曲张引流会影响立体定向放射外科手术后的动静脉畸形闭塞和出血率吗？案例匹配分析

作者¹使用大型动静脉畸形 (AVM) 放射外科系列研究立体定向放射外科手术前后静脉曲张静脉引流对出血的影响。他们发现静脉曲张引流与出血风险增加无关。许多研究人员试图定义与临床结果相关的血管结构风险因素。AVM 体积、是否存在与血流相关的动脉瘤、AVM 位置、患者年龄和引流静脉数量都已被研究。²静脉流出受限可能导致 AVM 的发生，研究静脉曲张可能在出血风险中发挥的作用是适当的。在他们的系列中，12% 的患者曾接受过部分切除术，28% 的患者有栓塞术。为了减少偏见，案例与......