Cheng Shih-Lung, Wang Hao-Chien, Yang Pan-Chyr
Department of Internal Medicine, National Taiwan University Hospital, No. 7 Chung-Shan South Road, Taipei 100, Taiwan.
J Clin Ultrasound. 2003 Jan;31(1):44-7. doi: 10.1002/jcu.10123.
An arteriovenous malformation (AVM) is an anomaly of capillary development that results in a direct connection between branches of an artery and veins, with no intervening capillary network. A definite diagnosis of AVM is usually made with angiography. We report the case of a posterior mediastinal AVM found on routine sonography in a 64-year-old woman with neglected hypertension and severe back pain. Color Doppler imaging showed 2 adjoined vascular structures without a typical mosaic-like flow pattern, and spectral Doppler analysis showed low-resistance flow and arteriovenous shunting in 2 adjoined vascular structures. The diagnosis was subsequently confirmed by angiography. Because disastrous bleeding could result if needle biopsy were performed inadvertently in the case of a suspected mediastinal AVM, we suggest that color Doppler sonography be attempted if there is an adequate acoustic window.
动静脉畸形（AVM）是一种毛细血管发育异常，导致动脉分支与静脉之间直接相连，其间没有毛细血管网。AVM的明确诊断通常通过血管造影来做出。我们报告一例64岁女性患者，患有未得到治疗的高血压和严重背痛，在常规超声检查中发现后纵隔AVM。彩色多普勒成像显示两个相邻的血管结构，没有典型的镶嵌样血流模式，频谱多普勒分析显示两个相邻血管结构中有低阻力血流和动静脉分流。随后血管造影证实了诊断。由于在疑似纵隔AVM的情况下，如果无意中进行针吸活检可能会导致灾难性出血，我们建议如果有足够的声学窗口，可尝试彩色多普勒超声检查。
