Introduction/Objective

Atrial appendage aneurysm in dogs is a rare condition and has not been well described. The aim of this study is to describe clinical and diagnostic imaging findings, especially computed tomography (CT), of atrial appendage aneurysms in dogs.

Animals

Seven client-owned dogs with a presumptive diagnosis of left or right atrial appendage aneurysm.

Materials and methods

Retrospective study. Medical records were searched to identify dogs with a presumptive diagnosis of left (LAAA) or right atrial appendage aneurysm (RAAA). Signalment, history, examination findings, diagnostic test results, and imaging procedures were reviewed. Archived diagnostic images were retrieved and evaluated by two board-certified radiologists and a board-certified cardiologist. Data analysis was descriptive.

Results

Six cases were diagnosed with RAAA and one with LAAA with a median age of 8 years. Five affected dogs were small to medium-breed male dogs. All dogs underwent a thoracic CT examination for various reasons and all cases of RAAA were incidental findings. CT was useful to identify and assess the atrial appendage aneurysm, as well as neighboring structures, although possible pericardial defects could not be visualized. Five dogs had a concurrent echocardiographic examination, which successfully identified the LAAA and two RAAA.

Conclusions

This case series described the clinical and CT findings in seven dogs with atrial appendage aneurysm, as well as echocardiographic findings in five of these cases. Right atrial appendage aneurysms appear to be mainly incidental findings. CT seems to be more sensitive than echocardiography in the detection of atrial appendage aneurysm.

中文翻译：

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犬心耳动脉瘤的临床和诊断影像学表现：7 例（2014-2020）

介绍/目标

狗的心耳动脉瘤是一种罕见的疾病，尚未得到很好的描述。本研究的目的是描述犬心耳动脉瘤的临床和诊断成像结果，尤其是计算机断层扫描 (CT)。

动物

七只客户拥有的狗，推定诊断为左或右心耳动脉瘤。

材料和方法

回顾性研究。搜索医疗记录以识别推定诊断为左（LAAA）或右心耳动脉瘤（RAAA）的狗。审查信号、病史、检查结果、诊断测试结果和成像程序。存档的诊断图像由两名获得委员会认证的放射科医生和一名获得委员会认证的心脏病专家检索和评估。数据分析是描述性的。

结果

6 例被诊断为 RAAA，1 例为 LAAA，中位年龄为 8 岁。五只受影响的狗是中小型雄性犬。由于各种原因，所有狗都接受了胸部 CT 检查，所有 RAAA 病例都是偶然发现的。CT 有助于识别和评估心耳动脉瘤以及邻近结构，尽管可能的心包缺损无法显示。五只狗同时进行了超声心动图检查，成功识别出 LAAA 和两条 RAAA。

结论

本病例系列描述了 7 只患有心耳动脉瘤的狗的临床和 CT 结果，以及其中 5 个病例的超声心动图结果。右心耳动脉瘤似乎主要是偶然发现。CT 在检测心耳动脉瘤方面似乎比超声心动图更敏感。