Variant origin of the left vertebral artery from a vertebro-subclavian trunk associated with an unusual branch arising from the brachiocephalic trunk

Nayak, Satheesha B and Rao, Srinivasa Sirasanagandla and Shetty, Surekha D and Deepthinath, R and Sudarshan, S and Raghu, J (2014) Variant origin of the left vertebral artery from a vertebro-subclavian trunk associated with an unusual branch arising from the brachiocephalic trunk. Journal of Surgical Academia, 4 (1). pp. 73-75.

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Abstract

Variant origin of the left vertebral artery (LVA) from the arch of aorta is well documented in the literature. Involvement of complex sequential developmental steps in the aortic arch formation results in different patterns of origin of LVA. Morphological variations in the LVA are thought to alter the cerebral hemodynamics and can cause the cerebral dysfunction. Knowledge of the morphological variations of the LVA is useful while performing the head and neck and thoracic surgeries. We here report one of the extremely rare patterns of the LVA origin, in a male cadaver aged about 65 years. LVA and left subclavian artery (LSA) arose as a common vertebro-subclavian trunk from the convexity of the aortic arch. Further, brachiocephalic trunk (BT) gave an unusual artery from its anterior surface. This artery divided into thymic and tracheal branches. Variant origin of thymic branch may be crucial during imaging and thymectomy procedures.

Item Type: Article
Uncontrolled Keywords: Vertebral artery; subclavian artery; variation, brachiocephalic trunk; thymic branch; tracheal branch.
Subjects: Medicine > MMMC Manipal > Anatomy
Depositing User: KMC Manipal
Date Deposited: 03 Jul 2014 04:33
Last Modified: 03 Jul 2014 04:33
URI: http://eprints.manipal.edu/id/eprint/140008

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