Bilateral variant origin of subclavian artery branches
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Subclavian artery branching patterns have been studied in cadaveric series and frequencies of the many variations have been documented. However, such variations have been seldom noticed antemortem. Here, we present the case of a very rare type of bilaterally different branching pattern of the subclavian artery.

Case Report
A 52-year-old male patient presented to our cardiology department for evaluation of chest pain. He eventually underwent a coronary angiogram during which he was deemed a suitable candidate for coronary artery bypass grafting (CABG). Contrast injection to the left subclavian artery (SCA) to assess the patency of the left internal thoracic artery (ITA) failed to clearly show the artery. Hence, a 64-slice CT angiogram with three-dimensional reconstruction and coronal and axial maximum intensity pixel (MIP) reconstruction was performed, which showed a variant origin of the branches of the left and right SCA.

http://www.birpublications.org/doi/full/10.1259/bjrcr.20150429
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