Anomalous Origin of the Right Vertebral Artery (original) (raw)
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COMMON ANOMALOUS ORIGIN OF LEFT VERTEBRAL ARTERY.pdf
The vertebral arteries (VA) are most important vessels for posterior cerebral circulations. The anomalous aortic origin of the left vertebral artery (LVA) is relatively common congenital anomalies, incidence up to 84.8%. On the dissected human heart specimens with the aortic arch branches, we observed two different patterns of anomalous aortic arch origin of left vertebral artery. The unusual aortic arch origin of LVA was observed between the LCCA & LSA in one specimen and after LSA in another. The present study aimed to establish the concept of the embryological basis behind the common anomalous aortic origin of left vertebral artery.
Anomalous origin of left vertebral artery
2013
Vertebral artery arises from the upper surface of the first part of subclavian artery on both sides. The morphological variations of the vertebral artery are of immense importance in surgery, angiography and all non-invasive procedures. During the routine dissection of a male cadaver aged about 65 years, we observed a variation in the branching of arch of aorta. The arch of aorta gave off four branches-brachiocephalic trunk, left common carotid artery (CCA), left vertebral artery (LVA) and left subclavian artery. LVA was arising between left CCA and left subclavian artery.The knowledge of variations in the vertebral artery is of great clinical interest to the neurosurgeon and radiologist for diagnostic investigation and surgical procedures of the neck.
Variant Origin of Left Vertebral Artery from Aortic Arch: Embryological Basis and A Case Report
Vertebral artery is the first branch of subclavian artery. It merges with the same artery of the opposite side to form basilar artery and becomes one of the important source of blood supply to the brain. Variation in the origin of left vertebral artery was found in 65 year old female during magnetic resonance angiography of the neck vessels. It originated from aortic arch and was longer as compared with the right vertebral artery. Its further course was as usual. Awareness of such variations is important in supra-aortic vascular surgery and is clinically significant during diagnostic procedures like angiographi.
Anomalous origin of the left vertebral artery in humans A rare anatomical finding
Context: Anatomical and morphological variations of the aortic arch and its branches are important in relation to thoracic and neck surgery. However, developmental abnormalities of the vertebral arteries are generally considered to be very rare. They have mostly been described in single case reports or small series. Thus, there is a need for further knowledge as an aid in planning surgery on the aortic arch or endovascular interventions. Objective: To report on a case of anomalous origin in the left vertebral artery. Case report: In a male cadaver, a left vertebral artery with its origin in the aortic arch between the left common carotid and left subclavian arteries was observed. Its length was 120 mm, and its diameter was 5.5 mm. It entered the transverse foramen of the third cervical vertebra. Conclusion: Knowledge of the anatomical variation of the origin of the vertebral artery is important not only diagnostically but also in planning surgery on the aortic arch or endovascular interventions.
Variation of Origin of Left Vertebral Artery: Phylogenic Correlation and Clinical Implication
International Journal of Medical and Health Sciences, 2013
Variations in the branching pattern of aortic arch are caused by alterations in embryological mechanisms and are implicated in certain clinical manifestations. Anomalous origin of supra aortic arch vessels are common and their detection is important for vascular surgeries of thorax and head and neck. Stenosis of Vertebral Artery (VA) is an important etiological factor for stroke involving posterior cerebrum. Advanced imaging studies like angiograms reveal conditions like VA occlusion prior to surgery. During the course of routine cadaveric dissection for student demonstration a 62 year old male cadaver presented unusual origin of Left Vertebral Artery (LVA). Anomalous of origin and distribution of LVA and its branches can lead to impaired cerebral hemodynamics and cerebral dysfunctions.
Variant Origin of Left Vertebral Artery: Cadaveric Case Report
2015
A thorough understanding of anomalous vertebral arteries is paramount when performing both diagnostic and interventional angiography in the head and neck. An abnormal origin of the vertebral artery may favour cerebral disorders because of alterations in cerebral hemodynamics and predispose the patient to intracranial aneurysms. Persistence of the proximal part of 6 th intersegmental artery to the left dorsal aorta or 4th left aortic arch presumably could yield the left vertebral artery from the aortic arch, proximal to the left subclavian origin. This is the most common anomalous origin. Knowledge of variations of vessels like left vertebral artery is of vital interest to the surgeons because a minor accidental injury of the vessels causes sudden massive hemorrhage. The present report should be of interest for the clinicians with regard to vascular variations in the neck and thoracic region, and may give insight into elucidating the developmental mechanism of angiogenesis.
Anatomical variation of the origin of the left vertebral artery
Int J Anat Var, 2009
This paper presents and describes the anatomical variation of the left vertebral artery originating from the arch of aorta as a case report. This variation was found in one of the cadavers at the Division of Clinical and Functional Anatomy, Faculty of Medicine, University of Ottawa. During routine dissection of a male cadaver, in the superior mediastinum and the neck we observed an atypical origin of the left vertebral artery. Atypical origin was compared to the typical origin of the left vertebral artery in the anatomical literature. We compared our findings with different possible variations of the origin of the left vertebral artery reported in the literature. The clinical importance of the variation is discussed. © IJAV. 2009; 2: 83-85.
Abnormal Origin of the Vertebral Artery from the Common Carotid Artery
2000
Summary: An abnormal origin of the vertebral artery from the common carotid artery (VA-CC) may occur on the right or left side with different embryonic mechanisms. We de- scribe a patient with a double developmental anomaly, a right VA-CC and a right aortic arch. The rotation of the aortic arch caused a "twist" of the embryonic mechanisms of VA-CC and
Atypical vertebral artery: embryological explanation and implications in neck surgery*
International Journal of Anatomical Variations, 2015
Atypical branches of the aortic arch (AA) occur frequently but are poorly explained. In an 82-year-old Caucasian male cadaver who died of coronary artery disease with severe aortic stenosis, the left vertebral artery (LVA) originated from the AA between the common carotid and subclavian arteries. The prevertebral part of LVA was narrower and entered the C5 transverse foramen. The right vertebral artery (RVA) from the right subclavian was wider than LVA suggesting compensation to the cerebral circulation. An unusual LVA may be asymptomatic; however, it is important in neck and supraaortic arch surgery and in non-invasive neck procedures. Vertebral arteries (VAs) are formed by development of longitudinal anastomoses linking the cervical intersegmental arteries, which regress except the seventh that becomes the proximal subclavian artery, the point of origin of the adult VA. Persistence of the 6th dorsal intersegmental artery might account for LVA arising from AA proximal to the subcla...
Surgical and radiologic anatomy : SRA, 2018
Several congenital anomalies regarding the right (RVA) and left (LVA) vertebral artery have been described. The current paper aims to perform a systematic literature review of the variable vertebral artery (VA) origin from the aortic arch (AOA) and its branches. The incidence of these variants and the ensuing AOA branching pattern are highlighted. Atypical origin cases were found more commonly unilaterally, while LVA presented the majority of the aberrancies. The LVA emersion from the AOA (3.6%) and the RVA from the right common carotid artery (RCCA) (0.14%) were the commonest origin variations. Aberrant RVA origin as last branch of the AOA is very rare. Eighteen cases (0.12%) with an aberrant right subclavian artery (ARSCA) were found. Among them, the RVA originated from the RCCA and right subclavian artery in 94.4 and 5.6%, respectively. Sporadic cases had an AOA origin bilaterally; RVA and LVA had a double origin in 0.027 and 0.11%, respectively. A dual origin was detected in 0.0...