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Vascular Medicine
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research-article

Multidetector computed tomographic angiography of aberrant subclavian arteries

Aysel Türkvatan

Department of Radiology, Türkiye Yüksek Ihtisas Hospital, Sihhiye, Ankara, Turkey

Fatma Gül Büyükbayraktar

Department of Radiology, Türkiye Yüksek Ihtisas Hospital, Sihhiye, Ankara, Turkey

Tülay Ölçer

Department of Radiology, Türkiye Yüksek Ihtisas Hospital, Sihhiye, Ankara, Turkey

Turhan Cumhur

Department of Radiology, Türkiye Yüksek Ihtisas Hospital, Sihhiye, Ankara, Turkey

Abstract

The purpose of this study was to evaluate the utility of 16-slice multidetector computed tomographic (MDCT) angiography for identifying anatomic features of aberrant subclavian arteries. Seventeen patients with aberrant subclavian arteries were assessed by MDCT angiography. The aortic arch position, the presence of a Kommerell’s diverticulum, aneurysm, vascular compression of trachea and oesophagus and associated cardiovascular abnormalities were evaluated. MDCT findings were confirmed by surgery in eight patients but in the other nine patients no further evaluation or management was warranted as the aberrant subclavian artery had no significant clinical consequence. Eleven patients had an aberrant right subclavian artery arising from the left aortic arch and six patients had an aberrant left subclavian artery arising from the right aortic arch. Kommerell’s diverticulum was identified in three patients with an aberrant right subclavian artery and in five patients with an aberrant left subclavian artery. In two patients it was aneurysmal. Oesophageal compression was detected in eight patients, and tracheal compression was identified in only one paediatric patient. An aberrant subclavian artery was associated with complex congenital heart disease in one patient, intracardiac defects in two patients, aortic coarctation in two patients, patent ductus arteriosus in two patients and an aberrant vertebral artery in one patient. In conclusion, MDCT angiography is superior to digital subtraction angiography for the assessment of aberrant subclavian arteries since digital subtraction angiography has only a poor ability to visualize adjacent structures completely and is invasive in nature. MDCT angiography or magnetic resonance angiography are the current standard in the initial evaluation of thoracic vascular anomalies.

Key Words: aortic diseases • cardiovascular diseases • subclavian artery • thoracic aorta • three-dimensional imaging • variant anatomy

Vascular Medicine, Vol. 14, No. 1, 5-11 (2009)
DOI: 10.1177/1358863X08097903
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