PMC5946619_01
Positive contrast oesophagram (lateral view) of the cat. Abrupt attenuation of the pasted barium contrast column is observed at the cranial site of the heart base along with cranial oesophageal dilation (arrow)
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The lateral view of the positive contrast oesophagram is shown in Figure 1.
(a) Left lateral and (b) dorsoventral images of three-dimensional CT angiography reconstruction in the cat. Note the aberrant right subclavian artery and left and right carotid arteries directly branching from the descending aorta. The dilated origin of the aberrant right subclavian artery (Kommerell's diverticulum) is also an unusual finding. AA = aortic arch; ARSA = aberrant right subclavian artery; BCT = bicarotid trunk; DAo = descending aorta; Es = oesophagus; LCA = left carotid artery; LSA = left subclavian artery; LV = left ventricle; RCA = right carotid artery
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Three-dimensional reconstruction images of CTA in the cat are shown in Figure 2. The aortic arch and proximal descending aorta were located to the left of the midline, which is a normal finding.
Intraoperative view of the cat showing a white silk thread passed around the aberrant right subclavian artery prior to its ligation and division. A black silk thread is shown around the left aortic arch. The dorsal and cranial aspects of the surgical field are to the top and left of the image, respectively. AA = aortic arch; ARSA = aberrant right subclavian artery; BCT = bicarotid trunk; DAo = descending aorta; Es = oesophagus; LSA = left subclavian artery
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The intraoperative view of the cat is shown in Figure 3.
Intraoperative angiogram of the aberrant right subclavian artery in the cat. ARSA = aberrant right subclavian artery; RAA = right axillary artery; RCA = right carotid artery; RCCA = right costal carotid artery; RITA = right internal thoracic artery; RVA = right vertebral artery
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Angiography (Iopamidol, 1 ml/kg) was performed with fluoroscopy to check the blood flow in the right subclavian artery peripheral to the right thoracic limb (Figure 4).