A five-month-old male intact Goldendoodle presented for evaluation for peripheral cyanosis following exercise. Transthoracic echocardiography demonstrated severe right ventricular wall thickening and right atrial dilation secondary to pulmonary hypertension. An agitated saline contrast study demonstrated an interatrial right-to-left shunt. Cardiac-gated computed tomography confirmed a reverse patent ductus arteriosus. This case report highlights the utility of cardiac-gated computed tomography in identifying multi-level intra- and extra-cardiac shunts.

中文翻译：

---

心脏门控计算机断层扫描在诊断伴有心内右向左分流的狗的逆向动脉导管未闭中的应用

一只五个月大的雄性完整金毛犬因运动后周围发绀而接受评估。经胸超声心动图显示严重的右心室壁增厚和继发于肺动脉高压的右心房扩张。搅拌盐水对比研究证实了房内从右向左分流。心脏门控计算机断层扫描证实存在反向动脉导管未闭。本病例报告强调了心脏门控计算机断层扫描在识别多级心脏内和心脏外分流方面的实用性。