BACKGROUND AND INTRODUCTION Patients presenting with posterior circulation acute ischemic events are occasionally noted to have occlusion of bilateral vertebral arteries with basilar artery blood flow entirely dependent from the anterior circulation. There is limited data about prognosis of such patients in literature. METHODS Patients with acute posterior circulation ischemic stroke and bila...

PURPOSE To determine the accuracy of transcranial Doppler (TCD) ultrasound for evaluation of collateral supply through the circle of Willis in patients with internal carotid artery (ICA) occlusion. METHODS The evaluation of the collateral pathways through the circle of Willis with TCD ultrasound and with cerebral angiography was compared in 40 patients (30 men, 10 women; mean age, 55 +/- 9 ye...

A 35-year-old man with Marfan syndrome presented to the emergency room with a severe occipital headache of several hours duration . The headache differed from his usual migraine headaches both in quality and in unresponsiveness to Cafergot. The patient's medical history included repair of an ascending aortic aneurysm and replacement of a bicuspid aortic valve 2112 years previously. The patient ...

Excessive sweating of the face and, to a lesser degree, of the thorax and limbs, occurred after basilar artery occlusion in a 15 year old Saudi boy. Magnetic resonance imaging (MRI) showed a limited bilateral paramedian infarction of the rostral ventral pons. Basilar artery occlusion in children and adolescents is a rarity. Excessive sweating following such a stroke is rare in any age group. Cl...

Eight patients are described who developed infarctions in the vertebral-basilar artery distribution following chiropractic neck manipulation or spontaneous head turning. The angiographic and autopsy findings indicate that injury to the intima of the vertebral artery at the atlantoaxial joint forms a nidus for thrombus formation which may propogate or embolize to involve other vessels in the ver...

Objective: A case in which intracranial arterial stenosis was exacerbated 5 months after percutaneous intracranial stent retriever thrombectomy is reported. Case Presentation: In a 62-year-old male, percutaneous intracranial thrombectomy using a stent retriever was performed for acute occlusion of the basilar artery. After complete recanalization, a stenotic lesion considered to be atherosclero...

A case is reported of a 72-year-old woman who presented with severe vertigo, vomit, and mild neck and occipital pain. She had a medical history of hypertension, angina pectoris, cholelithiasis, gastric ulcer, pyelonephritis and periodical mild dizziness. Neuroimaging revealed right vertebral artery occlusion, right cerebellar stroke and basilar impression. The therapeutic approach chosen in our...

The vascular anatomy and microvascular architecture of the vertebrobasilar system, especially within the brainstem, was investigated in cats. The main branches of the basilar artery were observed and the inner diameters of these vessels were measured on vertebral angiograms. The three-dimensional microvascular architecture was constructed using molded vascular models. The arterial anastomoses b...

Sustained contraction of isolated canine basilar artery was induced by addition of prostaglandin F2 alpha, prostaglandin E2, hemoglobin-containing solution, or serum. Human platelet aggregation was induced by 1.0 microM adenosine diphosphate. The sustained contraction of basilar artery and the aggregation of platelet, particularly its secondary aggregation, were inhibited in a dose-dependent ma...