Journal of Neurosciences in Rural Practice
 


 
  Table of Contents 
IMAGES IN NEUROSCIENCES
Year : 2018  |  Volume : 9  |  Issue : 4  |  Page : 578-579  

”Bovine aortic arch” in a patient with simultaneous bihemispheric embolic infarcts


Department of Neurosurgery, National Neurosciences Centre, Kolkata, West Bengal, India

Date of Web Publication29-Aug-2018

Correspondence Address:
Prasad Krishnan
Department of Neurosurgery, National Neurosciences Centre, Peerless Hospital Campus, 2nd Floor, 360 Panchasayar, Kolkata - 700 094, West Bengal
India
Login to access the Email id

Source of Support: None, Conflict of Interest: None


DOI: 10.4103/jnrp.jnrp_32_18

Rights and Permissions

How to cite this article:
Krishnan P. ”Bovine aortic arch” in a patient with simultaneous bihemispheric embolic infarcts. J Neurosci Rural Pract 2018;9:578-9

How to cite this URL:
Krishnan P. ”Bovine aortic arch” in a patient with simultaneous bihemispheric embolic infarcts. J Neurosci Rural Pract [serial online] 2018 [cited 2018 Dec 18];9:578-9. Available from: http://www.ruralneuropractice.com/text.asp?2018/9/4/578/239833



A 60-year-old male who had suffered a myocardial infarction 3 weeks previously presented with sudden-onset aphasia and weakness of all four limbs. Computed tomography (CT) scan showed bilateral frontoparietal hypodensities [Figure 1]. Magnetic resonance imaging showed [Figure 2] bilateral infarcts (of the same age) with patchy hemorrhagic transformation. Due to the discrete bihemispheric location of the infarcts, an embolic cause was suspected. To delineate the cause, initially, an echocardiogram was done that showed akinetic and thin inferoposterior wall with dilated left atrium and mild mitral regurgitation with impaired left ventricular systolic function (ejection fraction 46%). A Holter study showed no evidence of atrial fibrillation. Then, a CT angiogram of the great vessels was done that showed an anomalous origin of the left common carotid artery (CCA) from the innominate artery (IA) [Figure 3]. Finally, a transesophageal echocardiography was done that showed the presence of a clot in the left atrium.
Figure 1: Axial noncontrast computed tomography scan sections showing bihemispheric hypodensities in frontoparietal regions

Click here to view
Figure 2: Axial magnetic resonance imaging showing bilateral hyperintensities suggestive of infarct in (a) fluid attenuation inversion recovery sequences with evidence of hemorrhagic transformation in (b) gradient echocardiography imaging sequences

Click here to view
Figure 3: Computed tomography angiography images with three-dimensional reconstruction (a) anterior view and (c) posterior view showing common origin of the left common carotid artery and innominate artery from the aortic arch (b) coronal computed tomography image with contrast showing both common carotid artery resembling horns of a bull

Click here to view


In humans, the commonly encountered branching pattern from the arch of the aorta consists of the IA, the left CCA and the left subclavian artery originating separately.[1] The variation seen in our patient consisted of the left CCA having a common origin with the IA from a single vascular trunk. This variant is most often termed a “bovine aortic arch.”[1] Others describe a more distal origin of the left CCA from the IA itself as the “bovine arch.”[1],[2],[3] However, the term “bovine aortic arch” in both these instances is a misnomer whose origin is unknown [2] since in cattle, a single great vessel originates from the aortic arch and trifurcates into both subclavian arteries and a bicarotid trunk (which subsequently divides to the right and left CCAs, respectively).[1] Vitek [4] has commented on this “discordance of terminology” and suggested that the radiological resemblance to the 2 horns on the head of the cow might have led to this term.

This variant occurs due to slower growth of the 3rd and 4th ventral aortic roots in fetal life resulting in the common origin of the left CCA and IA.[3] We hypothesize that in our patient, the relatively large size of the combined IA and left CCA origin led to a “streaming phenomenon”[3] that might have sucked in a dislodged cardiac thrombus and caused simultaneous embolic infarcts in both the cerebral hemispheres.

Declaration of patient consent

The authors certify that they have obtained all appropriate patient consent forms. In the form the patient(s) has/have given his/her/their consent for his/her/their images and other clinical information to be reported in the journal. The patients understand that their names and initials will not be published and due efforts will be made to conceal their identity, but anonymity cannot be guaranteed.

Financial support and sponsorship

Nil.

Conflicts of interest

There are no conflicts of interest.



 
   References Top

1.
Layton KF, Kallmes DF, Cloft HJ, Lindell EP, Cox VS. Bovine aortic arch variant in humans: Clarification of a common misnomer. AJNR Am J Neuroradiol 2006;27:1541-2.  Back to cited text no. 1
    
2.
Arnáiz-García ME, González-Santos JM, López-Rodriguez J, Dalmau-Sorli MJ, Bueno-Codoñer M, Arévalo-Abascal A, et al. A bovine aortic arch in humans. Indian Heart J 2014;66:390-1.  Back to cited text no. 2
    
3.
Malone CD, Urbania TH, Crook SE, Hope MD. Bovine aortic arch: A novel association with thoracic aortic dilation. Clin Radiol 2012;67:28-31.  Back to cited text no. 3
    
4.
Vitek JJ. Bovine aortic arch. AJNR Am J Neuroradiol 2007;28:1205.  Back to cited text no. 4
    


    Figures

  [Figure 1], [Figure 2], [Figure 3]



 

Top
 
 
  Search
 
    Similar in PUBMED
   Search Pubmed for
   Search in Google Scholar for
    Access Statistics
    Email Alert *
    Add to My List *
* Registration required (free)  

 
  In this article
    References
    Article Figures

 Article Access Statistics
    Viewed146    
    Printed1    
    Emailed0    
    PDF Downloaded5    
    Comments [Add]    

Recommend this journal