Schwarz Tobias, Willis Ruth, Summerfield Nuala J, Doust Ross
Department of Clinical Studies, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA.
J Am Vet Med Assoc. 2005 May 1;226(9):1512-5, 1500. doi: 10.2460/javma.2005.226.1512.
An 8-year-old sexually intact male Golden Retriever with a history of collapse during exercise underwent an examination during which tachydysrhythmia was identified. At another institution, a 12.5-year-old spayed female Lhasa Apso was referred because of a cough and for evaluation of a heart murmur. In the Golden Retriever, radiographic examination revealed bulging of the craniodorsal aspect of the cardiac silhouette and echocardiography revealed right atrial dilatation. In the Lhasa Apso, a cranial mediastinal mass was suspected on the basis of radiographic findings, but no abnormalities were detected echocardiographically. In both dogs, nonselective angiography and contrast-enhanced computed tomography revealed a markedly enlarged, thin-walled right auricle. Exploratory thoracotomy in the Golden Retriever revealed a defect in the pericardium through which the right auricle and part of the atrium had herniated. In dogs, a right auricular aneurysm should be considered in differential diagnoses of a cranial mediastinal mass (detected radiographically) adjacent to the cardiac silhouette.
一只8岁未绝育的雄性金毛猎犬，有运动时虚脱病史，在检查中发现了快速心律失常。在另一家机构，一只12.5岁已绝育的雌性拉萨犬因咳嗽和心脏杂音评估而被转诊。在金毛猎犬中，X线检查显示心脏轮廓的颅背侧膨出，超声心动图显示右心房扩张。在拉萨犬中，根据X线检查结果怀疑有纵隔前部肿块，但超声心动图未检测到异常。在两只犬中，非选择性血管造影和对比增强计算机断层扫描均显示右心耳明显增大、壁薄。对金毛猎犬进行的 exploratory thoracotomy（此处原文有误，推测应为“开胸探查术”）显示心包有一个缺损，右心耳和部分心房由此疝出。在犬类中，对于在心脏轮廓附近（通过X线检查发现）的纵隔前部肿块进行鉴别诊断时，应考虑右心耳动脉瘤。
