• Vertigo is one of several common presenting symptoms associated with basilar artery occlusion. (medscape.com)
  • Given the anatomy of the posterior circulation and the circle of Willis, the clinical manifestations of basilar artery thrombosis depend on the location of the occlusion, the extent of the thrombus, and the collateral flow. (medscape.com)
  • If the proximal segment of the basilar artery is occluded and the occlusion has resulted from a slowly progressive stenosis, collateralization occurs within the cerebellum into the circumferential branches of the basilar artery. (medscape.com)
  • The mechanism of stroke in basilar artery occlusion differs depending on the segment of the vessel involved. (medscape.com)
  • Through cerebral angiography, the sign has been demonstrated to correspond to embolic or atherosclerotic occlusion of an artery. (wikipedia.org)
  • OBJECTIVE: Perfusion imaging identifies anterior circulation stroke patients who respond favorably to endovascular thrombectomy (ET), but its role in basilar artery occlusion (BAO) is unknown. (bvsalud.org)
  • 4. López-Serna R, González-Carmona P, López-Martínez M. Bilateral thalamic stroke due to occlusion of the artery of Percheron in a patient with patent foramen ovale: a case report. (radiopaedia.org)
  • 7. Anderson C, O'Brien R. Occlusion of the artery of Percheron: an unusual cause of bilateral stroke. (radiopaedia.org)
  • It is formed at the pontomedullary junction by the confluence of both vertebral arteries. (medscape.com)
  • Normally, the blood flows in an anterograde fashion from the vertebral arteries to the basilar artery up to its terminal branches. (medscape.com)
  • The vertebral arteries arise from the subclavian arteries, and as they course cephalad in the neck, they pass through the costotransverse foramina of C6 to C2. (medscape.com)
  • The medulla is perfused by the PICA and by direct, smaller branches from the vertebral arteries. (medscape.com)
  • Vertebrobasilar dolichoectasia is a condition characterized by tortuous dilatation and marked enlargement of the basilar and vertebral arteries, and it may cause posterior circulation infarction. (bvsalud.org)
  • This study focused on local hemodynamic changes in basilar arteries with typical vertebrobasilar dolichoectasia, together with unbalanced vertebral arteries and abnormal structures of the circle of Willis, through multi-scale modeling. (bvsalud.org)
  • The first type has no vertebrobasilar dolichoectasia, the second type has vertebrobasilar dolichoectasia and balanced vertebral arteries, and the third type has vertebrobasilar dolichoectasia and unbalanced vertebral arteries. (bvsalud.org)
  • FINDINGS: The results showed that unbalanced bilateral vertebral arteries, especially single vertebral artery deletion mutation, might associate with higher wall shear stress on anterior wall of basilar artery in patients with vertebrobasilar dolichoectasia. (bvsalud.org)
  • And unbalanced bilateral vertebral arteries would increase the blood pressure in basilar artery. (bvsalud.org)
  • Proximal to its bifurcation into the terminal branches (ie, PCA), the basilar artery gives off the superior cerebellar arteries that supply the lateral aspect of the pons and midbrain and the superior surface of the cerebellum. (medscape.com)
  • The cerebellum is supplied by long circumferential arteries, the PICA, and the anterior inferior and superior cerebellar arteries from the basilar artery. (medscape.com)
  • Acute basilar artery thrombosis is associated with a poor prognosis. (medscape.com)
  • Although outcomes continue to be poor in patients with basilar artery thrombosis, advances in pharmacologic and mechanical thrombolysis and in endovascular therapy may reduce the mortality and disability rates associated with this disease. (medscape.com)
  • The risk factors for basilar artery thrombosis are the same as those seen generally in stroke . (medscape.com)
  • Penetrating arteries from the PCAs perfuse the midbrain and thalamus, and the occipital cortex is perfused by the PCAs. (medscape.com)
  • The midbrain V sign is a feature demonstrated on 67% of patients with the artery of Percheron infarctions involving the midbrain. (radiopaedia.org)
  • Atherosclerotic occlusive disease predominantly affects the midsegment of the basilar artery, followed by the vertebrobasilar junction. (medscape.com)
  • Embolism, either from a cardiac or arterial source, is much more frequent in the distal third of the basilar artery and the vertebrobasilar junction. (medscape.com)
  • BACKGROUND: Vertebrobasilar dolichoectasia is a rare cerebrovascular disease characterized by obvious extension, dilation and tortuosity of vertebrobasilar artery, and its pathophysiological mechanism is not clear. (bvsalud.org)
  • METHODS: Three-dimensional models of 3 types of vertebrobasilar arteries were constructed from magnetic resonance images. (bvsalud.org)
  • Artery of Percheron infarction is best visualized on DWI or FLAIR sequences on MRI and is often missed on initial CT. (radiopaedia.org)
  • Artery of percheron infarction: imaging patterns and clinical spectrum. (radiopaedia.org)
  • 5. Rivera-Lara L, Henninger N. Delayed sudden coma due to artery of percheron infarction. (radiopaedia.org)
  • They enter the skull through the foramen magnum and merge at the pontomedullary junction to form the basilar artery. (medscape.com)
  • Artery of Percheron territory infarct is rare, on account of the relative rarity of the artery of Percheron, and presents with a variety of signs and symptoms collectively termed the paramedian thalamic syndrome . (radiopaedia.org)
  • Clinical Spectrum of Artery of Percheron Infarct: Clinical-Radiological Correlations. (radiopaedia.org)
  • In medicine, the dense artery sign or hyperdense artery sign is an increased radiodensity of an artery as seen on computer tomography (CT) scans, and is a radiologic sign of early ischemic stroke. (wikipedia.org)
  • Rarely, a hypodense artery sign can occur due to fat embolism. (wikipedia.org)
  • Identification of the dense artery sign is often based on subjective interpretation and false positives may occur. (wikipedia.org)
  • Because of this arrangement of collateral vessels, even when one of the main arteries is occluded, adequate perfusion of the brain still may be possible. (medscape.com)