Vertebral artery hypoplasia
Updates to Article Attributes
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was changed:
AHypoplastic hypoplastic vertebral artery is a congenital variation characterised by the underdevelopment of the vertebral artery.
Epidemiology
It's an uncommon finding and was reported to be 2-6% from autopsy and angiograms 1.
Clinical presentation
It's an asymtpomatic variation in healthy people and there are no signs of vertebrobasilar insufficiency even among patients with pronounced asymmetry 2.
Radiographic features
There is no clear consensus on the dentitiondefinition of the hypoplastic vertebral artery, but it's defined by some authors as 2:
- diameter of the lumen of the vertebral artery < 2.2 mm
- vertebral artery volume flow < 30 - 40 ml/min on coulour duplex ultrasonography
Complications
Individuals with hypoplastic vertebral artery are more likely to develop inferior cerebellar artery or lateral medullary infarction.
Healthy subjects presenting this condition demonstrated abnomral vestibular evoked myogenic potential 3.
Differential diagnosis
Vertebral artery dissection is the main differential diagnosis.
-<p><strong>Hypoplastic vertebral artery</strong> is a congenital variation characterised by the underdevelopment of the <a title="vertebral artery" href="/articles/vertebral-artery">vertebral artery</a>.</p><h4>Epidemiology</h4><p>It's an uncommon finding and was reported to be 2-6% from autopsy and angiograms <sup>1</sup>.</p><h4>Clinical presentation</h4><p>It's an asymtpomatic variation in healthy people and there are no signs of vertebrobasilar insufficiency even among patients with pronounced asymmetry <sup>2</sup>.</p><h4>-<br>Radiographic features</h4><p>There is no clear consensus on the dentition of the hypoplastic vertebral artery, but it's defined by some authors as <sup>2</sup>:</p><ul>- +<p>A<strong> hypoplastic vertebral artery</strong> is a congenital variation characterised by underdevelopment of the <a href="/articles/vertebral-artery">vertebral artery</a>.</p><h4>Epidemiology</h4><p>It's an uncommon finding and was reported to be 2-6% from autopsy and angiograms <sup>1</sup>.</p><h4>Clinical presentation</h4><p>It's an asymtpomatic variation in healthy people and there are no signs of vertebrobasilar insufficiency even among patients with pronounced asymmetry <sup>2</sup>.</p><h4>Radiographic features</h4><p>There is no clear consensus on the definition of the hypoplastic vertebral artery, but it's defined by some authors as <sup>2</sup>:</p><ul>
-</ul><h4>Complications</h4><p>Individuals with hypoplastic vertebral artery are more likely to develop inferior cerebellar artery or lateral medullary infarction.</p><p>Healthy subjects presenting this condition demonstrated abnomral vestibular evoked myogenic potential <sup>3</sup>.</p><h4>Differential diagnosis</h4><p><a title="Vertebral artery dissection" href="/articles/vertebral-artery-dissection">Vertebral artery dissection</a> is the main differential diagnosis.</p>- +</ul><h4>Complications</h4><p>Individuals with hypoplastic vertebral artery are more likely to develop inferior cerebellar artery or lateral medullary infarction.</p><p>Healthy subjects presenting this condition demonstrated abnomral vestibular evoked myogenic potential <sup>3</sup>.</p><h4>Differential diagnosis</h4><p><a href="/articles/vertebral-artery-dissection">Vertebral artery dissection</a> is the main differential diagnosis.</p>
References changed:
- 1. Chuang YM, Chan L, Wu HM, Lee SP, Chu YT. The clinical relevance of vertebral artery hypoplasia. (2012) Acta neurologica Taiwanica. 21 (1): 1-7. <a href="https://www.ncbi.nlm.nih.gov/pubmed/22879083">Pubmed</a> <span class="ref_v4"></span>
- 2. Park JH, Kim JM, Roh JK. Hypoplastic vertebral artery: frequency and associations with ischaemic stroke territory. (2007) Journal of neurology, neurosurgery, and psychiatry. 78 (9): 954-8. <a href="https://doi.org/10.1136/jnnp.2006.105767">doi:10.1136/jnnp.2006.105767</a> - <a href="https://www.ncbi.nlm.nih.gov/pubmed/17098838">Pubmed</a> <span class="ref_v4"></span>
- 3. Chuang YM, Chen CC, Lin CP. Vertebral artery hypoplasia may contribute to abnormal vestibular evoked myogenic potentials. (2009) Acta neurologica Taiwanica. 18 (2): 113-7. <a href="https://www.ncbi.nlm.nih.gov/pubmed/19673363">Pubmed</a> <span class="ref_v4"></span>
Sections changed:
- Anatomy
Systems changed:
- Head & Neck
Images Changes:
Image 1 CT (3D VR) ( create )
Image 2 MRI ( create )
Image 3 CT (C+ arterial phase) ( create )
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